Under the different sowing seeds way the soil ulmin, the alkaline hydrolysis nitrogen, the fast-acting phosphorus content present the tendency which in 0-40cm various soil layers increases along with the soil layer depth reduces, take 0-10cm soil layer soil content as biggest; The change tendency which the colleague mixes broadcasts mixes with the interlacing broadcasts the change tendency which the lawn fast-acting potassium presents reduces, after the unicast awnless brome lawn presents falls first, increases again falls, take 0-10cm and 20-30cm soil layer soil content as biggest, is 80, and achieves the extremely remarkable difference with other soil layers between; pH presents increases the tendency.

混播草地上牧草根系死亡后在线亚洲国产鲁一鲁网，能在土壤中遺留大量的有機(jī)質(zhì)国产女同一区二区在线视频，在土壤微生物的作用下形成土壤腐殖質(zhì)禁止18岁以下观看的网站，其中有豐富的氮免费看操、磷免费视频XNXX在线观看、鉀等元素。無芒雀麥欧美操大黑逼片，又名禾萱草igao13.com，無芒草，是世界上分布較廣午夜日韩福在线播放，應(yīng)用較多的優(yōu)良牧草；是草地補(bǔ)播和建立人工草地的理想草種玖玖玖在线资源。無芒雀麥生長(zhǎng)快色色的五月天，競(jìng)爭(zhēng)力強(qiáng)免费可以直接看黄视频网站，在雜草較多的草荒地上種植，也能獲得成功91人妻大绿帽子论坛，為我國(guó)溫帶和寒溫帶建造人工草地的當(dāng)家草種在线无码国产观看播放网址。

After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

開式磁路是由2片釹鐵硼磁鐵和主導(dǎo)磁板和導(dǎo)磁墊片組成，我們?cè)趯?shí)踐過程中發(fā)現(xiàn)這種磁路結(jié)構(gòu)不適合于低頻揚(yáng)聲器的使用精品aa视频在线，我們通過使用FEMM（Finite Element Method Magnetics）軟件包對(duì)該磁路進(jìn)行了分析2019年一级黄片，該磁路的磁場(chǎng)范圍被分成3個(gè)區(qū)域，其中在主導(dǎo)磁板附近形成一個(gè)正向磁場(chǎng)国产91中文字幕，在正向磁場(chǎng)的兩邊存在反向的磁場(chǎng)欧美丝袜A∨在线一区二区三区，音圈在工作時(shí)有很大一部分進(jìn)入了反向磁場(chǎng)中，在反向磁場(chǎng)內(nèi)線圈的感應(yīng)電流方向與驅(qū)動(dòng)電流方向相同鲁一鲁性爱视频播放，使得音圈呈現(xiàn)出負(fù)感抗特性加勒比官网中文在线，由于音圈的負(fù)感抗特性引起電流的增加導(dǎo)致音圈發(fā)熱甚至燒毀，因此在揚(yáng)聲器中使用開式磁路時(shí)免费亚洲爱爱视频，音圈的運(yùn)動(dòng)范圍應(yīng)控制在正向磁場(chǎng)范圍之內(nèi)国产麻豆综合在线视频，否則音圈運(yùn)動(dòng)到反向磁場(chǎng)區(qū)域時(shí)將會(huì)產(chǎn)生很大的失真和發(fā)熱，即使在設(shè)計(jì)時(shí)已經(jīng)將音圈的運(yùn)動(dòng)范圍控制在正向磁場(chǎng)范圍之內(nèi)韩国日本国产欧美一区二区，由于正向磁場(chǎng)的2個(gè)邊緣磁場(chǎng)強(qiáng)度衰減太快国产乱人视频在线观看ktv，同時(shí)開式磁路中磁場(chǎng)的分布不是平行的，而是自由發(fā)散的分布啪啪啪啪网址，這樣肯定會(huì)導(dǎo)致?lián)P聲器的非線性失真久久无码免费的A毛片大全，因此我們得到的結(jié)論是：開式磁路并不是一個(gè)理想的磁路，它不適合于低頻揚(yáng)聲器的使用亚洲A级片中文字幕在线观看，但它還可以應(yīng)用于中高頻揚(yáng)聲器草草操视频。

The opened magnetic circuit is composed as tow NdFeB permanent magnets and a top plate without U-yoke. After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

開式磁路是由2片釹鐵硼磁鐵和主導(dǎo)磁板和導(dǎo)磁墊片組成，我們?cè)趯?shí)踐過程中發(fā)現(xiàn)這種磁路結(jié)構(gòu)不適合于低頻揚(yáng)聲器的使用国产精品香蕉在线的人，我們通過使用FEMM（Finite Element Method Magnetics）軟件包對(duì)該磁路進(jìn)行了分析国产精品萌妹子6人美女毛片视频一区二区，該磁路的磁場(chǎng)范圍被分成3個(gè)區(qū)域，其中在主導(dǎo)磁板附近形成一個(gè)正向磁場(chǎng)色久综合在线，在正向磁場(chǎng)的兩邊存在反向的磁場(chǎng)www.91久久，音圈在工作時(shí)有很大一部分進(jìn)入了反向磁場(chǎng)中，在反向磁場(chǎng)內(nèi)線圈的感應(yīng)電流方向與驅(qū)動(dòng)電流方向相同女人18毛片九区毛片，使得音圈呈現(xiàn)出負(fù)感抗特性2021最新韩国三级理论电影，由于音圈的負(fù)感抗特性引起電流的增加導(dǎo)致音圈發(fā)熱甚至燒毀，因此在揚(yáng)聲器中使用開式磁路時(shí)爽爽爽A片男女免费爽视频屁股，音圈的運(yùn)動(dòng)范圍應(yīng)控制在正向磁場(chǎng)范圍之內(nèi)一级簧片a片，否則音圈運(yùn)動(dòng)到反向磁場(chǎng)區(qū)域時(shí)將會(huì)產(chǎn)生很大的失真和發(fā)熱，即使在設(shè)計(jì)時(shí)已經(jīng)將音圈的運(yùn)動(dòng)范圍控制在正向磁場(chǎng)范圍之內(nèi)，由于正向磁場(chǎng)的2個(gè)邊緣磁場(chǎng)強(qiáng)度衰減太快操欧美老女人的大肥逼，同時(shí)開式磁路中磁場(chǎng)的分布不是平行的xx网站在线观看，而是自由發(fā)散的分布，這樣肯定會(huì)導(dǎo)致?lián)P聲器的非線性失真久久激情精品视频，因此我們得到的結(jié)論是：開式磁路并不是一個(gè)理想的磁路国产91精品片在线，它不適合于低頻揚(yáng)聲器的使用，但它還可以應(yīng)用于中高頻揚(yáng)聲器神马播播岛热岛私人影院。

Yeah,this right here goes to everyone that has last someone come on ,check it out seems like yesterday we used to rock i laced the frack you lock the flow so far hanging on the block for dough no'torious they got to know that life ain't always what it seems to be words can't express what you mean to me even though you're gone .we are still a leam through your family,i'll fulfill your dream in the future can't wait to see if you'll open up the gates for me reminiscence sometime ,the night they try to block it out ,but it plays again when its real feelings hard to conceal can't image all the pain i feel give anything to hear half your breath i know your still living your life after deathy every step i take, every move i make every single day, every time i pray i'll be missing you thinking of the day when you went away what a life to take what a band to break i'll be missing you i miss you b.i.g.

是的欧美4438，就在這里去所有有最后一個(gè)來吧，看看看來我們昨天用于巖石我的frack濃黑的流動(dòng)你鎖定到目前為止亚洲欧美日韩精品视频一区，掛在那塊面團(tuán)沒有'torious他們必須知道生活不總是似乎是什么不能用言語來表達(dá)你對(duì)我而言意味著什么即使你離去的時(shí)候香蕉香蕉国产片一级一级毛片，我們?nèi)匀皇且粋€(gè)定義通過你的家人，我會(huì)實(shí)現(xiàn)你的夢(mèng)想在未來等不及想看看如果你要為我打開大門有時(shí)国产系列第一页，他們銘記試圖阻止它www.99riav24.com，但它在腦中重現(xiàn)當(dāng)它真正的感情就很難隱藏嗎所有的痛苦無法形象時(shí)，我的感覺付出一切对白露脸视频一区二区在线，只為再聽到你的呼吸我知道你deathy后仍然生活我踏出的每一步日本619视频网站www，我的每一個(gè)舉動(dòng)每一天，每次我禱告我會(huì)想念你思想的一天當(dāng)你走了嗎什么是生活什么樂隊(duì)來幫忙我會(huì)想念你我想你b.i.g超碰在线最新地址。

In recent years , land economic county have, private economy refer to into high position very, private economy take place tough place as Fujian, Fujian Jinjiang take one county land unique road of economic development, economy is developed at a high speed year after year, the basic competitiveness of national county land economy in 2003 ranks the fifth while appraising , has already become the national one hundred prosperous counties for several years in succession, its hypernormal development model has received the great concern.

近幾年來伊人中文字幕中文无码，縣域經(jīng)濟(jì)、民營(yíng)經(jīng)濟(jì)被提到了很高的位置上日本黄页网，作為福建民營(yíng)經(jīng)濟(jì)的發(fā)軔之地色哟哟一区二区，福建晉江走出了一條縣域經(jīng)濟(jì)發(fā)展的獨(dú)特道路，經(jīng)濟(jì)連年高速發(fā)展乱伦国产视频，在2003 年的全國(guó)縣域經(jīng)濟(jì)基本競(jìng)爭(zhēng)力評(píng)價(jià)中排在第五位色在线,com，已經(jīng)連續(xù)幾年成為全國(guó)百?gòu)?qiáng)縣，其超常規(guī)發(fā)展模式受到了極大的關(guān)注亚洲午夜理伦片。

There are a lot of skilled workers in our plant, they take the straw as material, through the traditional technics such cutting, shaving, grinding, searing etc. They also take modern technics into the manufacture process such as evaporation, torrefaction, dissection and ironing. After taken these process, we get the straw patchwork which filled with thick Chinese countryside tinge.

公司擁有一批技術(shù)精湛的設(shè)計(jì)和操作人員黄页网站大全手机在线观看，利用我國(guó)民間自然資源-麥稈，通過傳統(tǒng)的削日本乱子视频在线播放、割国产呦系列合集1000部、刮、碾自拍偷拍h、燙等工藝亚洲欧美日本A∨在线观看，使用現(xiàn)代工藝對(duì)麥稈進(jìn)行蒸、煮日本特级黄色一区二区三区、烘免费国产乱伦不卡、剖无码AV无码AV毛片毛、染等理化處理，制作出凝聚著濃郁的鄉(xiāng)土氣息的純手工工藝品激情国产手机视频在线观看，題材涉及花鳥蟲魚曰批免费网站播放免费、山水風(fēng)景、亭臺(tái)樓閣和人物時(shí)尚等日韩精品爆乳蜜桃视频在线。

Karatsu take high-speed, and then switch to high-speed Beijing-Tianjin-Tanggu, in Yixing Bu under the high-speed, and then take the Outer Ring Road in Tianjin, more than 10 minutes after taking Tsubo high-speed, it is up!

走唐津高速，然后轉(zhuǎn)京津塘高速国产精品日韩在线观看最大，在宜興埠下高速一级在线免费WWw，然后走天津外環(huán)線，十多分鐘后清纯唯美色五月，走津保高速黄色网站网址入口，就到了！

With social changes, the meanings of modern women vary in both on-the-job field and family. Modern women are not only obviously different from traditional family-style images but career women who might take upon oneself several posts and take in charge all by themselves. However the social pressure that modern women bear on increase severely day after day.

隨著社會(huì)變遷大粗鳮巴r人妻文，現(xiàn)代女性不論在職場(chǎng)或家庭結(jié)構(gòu)中97碰碰碰人妻无码视频野外，所代表的意義也隨之不同，現(xiàn)代女性已顯然的不同於拘泥於家庭中相夫教子的傳統(tǒng)女性www.344ya.com，而是身兼數(shù)職且獨(dú)當(dāng)一面的職業(yè)婦女性爱无毒网页，但相對(duì)的對(duì)女性所承受的社會(huì)壓力也日與劇增。

And finally we came with the best procedure: you pour refined spirits up to a third of a glass and take it in one gulp. Immediately after that you take two gulps of water – and you are in perfect bliss!

最后我們找到了一種最好的工序：往玻璃杯里倒上大約三分之一的精釀白酒99r只有精品免费视频，一口喝下去www.99re.com，然后馬上喝上兩口水—那時(shí)你就會(huì)覺得身在仙境！

Please untie your belt after the plane get its balance, and take your hand-take to get ready to get down.

等飛機(jī)完全停穩(wěn)后性交年费a，請(qǐng)你再解開安全欧美性爱22k29.c0m，整理好手提物品準(zhǔn)備下飛機(jī)。