So the proposed ZVT-PWM flyback dc/dc converter does not increase active or passive clamper circuit to suppress the switch voltage stress and can reduce switch loss to promote the efficiency of the circuit.

文中詳細(xì)說(shuō)明電路之操作原理并推導(dǎo)各個(gè)工作模式下的等效電路及轉(zhuǎn)換器設(shè)計(jì)方法A片在线观看视频免费网址。

In view of practical problem during Sulige gas field development, this paper complete follow study content. Study material balance theory of two district compound gas reservoir. Carry out stress sensitivity experiment on matrix rock and labor created fracture core from Sulige gas field with America Core Company high pressure high temperature flow experimental instrument to study stress sensitivity change rule of different permeability matrix rock and created fracture core at the condition of time and again switch on and off well and different drawdown pressure. Carry out depletion experiment on matrix rock of different permeability serial combination with different kinds of allocation, using double core clamper serial connected experimental apparatus, to study gas well production performance of bi-zonal compound low permeability reservoir during low pressure production stage. At the basis of experimental study, establish single well simulation model to analyze development index infection caused by stress sensibility and production performance infection rule caused by inner formation and outer formation of bi-zonal compound gas reservoir permeability variation while considering stress sensitivity.

針對(duì)蘇里格低滲氣田開(kāi)發(fā)中存在的實(shí)際問(wèn)題国产原创网站，完成以下研究?jī)?nèi)容99热嫖妓国语对白；研究了兩區(qū)復(fù)合氣藏物質(zhì)平衡原理免费a片视频网站；利用美國(guó)巖芯公司高溫高壓流動(dòng)實(shí)驗(yàn)儀av网站在线观看播放免费，對(duì)取自蘇里格氣田基質(zhì)巖芯和人工造縫巖芯進(jìn)行應(yīng)力敏感實(shí)驗(yàn)美女被操逼网站，研究不同滲透率基質(zhì)巖芯和造縫巖芯在多次開(kāi)關(guān)井和不同生產(chǎn)壓差條件下的應(yīng)力敏感變化規(guī)律；采用雙巖芯夾持器串聯(lián)實(shí)驗(yàn)裝置偷拍网站导航，對(duì)不同滲透率串聯(lián)組合的基質(zhì)巖芯進(jìn)行各種配產(chǎn)條件下的衰竭實(shí)驗(yàn)99国产性爱，研究?jī)蓞^(qū)復(fù)合的低滲儲(chǔ)層氣井在低壓生產(chǎn)階段的生產(chǎn)動(dòng)態(tài)特征；在實(shí)驗(yàn)研究的基礎(chǔ)上日韩黄页无码精品视频，建立單井模擬模型分析儲(chǔ)層應(yīng)力敏感性和非均質(zhì)性對(duì)開(kāi)發(fā)指標(biāo)的影響黄黄黄片AAAAA，研究考慮應(yīng)力敏感時(shí)兩區(qū)復(fù)合氣藏儲(chǔ)層中內(nèi)區(qū)和外區(qū)滲透率變化對(duì)開(kāi)發(fā)動(dòng)態(tài)的影響規(guī)律日本黄a网站。

The thin film packing,equipped with a chopstick clamper and an automatic stopping,features embossing,three-sided sealing,cutting,automatic counting and tiding up.

ZK-3A 薄膜筷子包裝機(jī)是將現(xiàn)成印制分切好的卷筒膜，包裝一次性木制或竹制筷子樱花视频操逼。一雙筷子包一個(gè)袋子人人操操操操操操，通過(guò)壓花，三邊封口色哟哟毛片网站，切斷黄色av网址在线播放，完成包裝。

The t你好n film packing,equipped with a chopstick clamper and an automatic stopping,features embossing,three-sided sealing,cutting,automatic counting and tiding up.

一雙筷子包一個(gè)袋子伊人黄片啪啪啪，經(jīng)由過(guò)程壓花亚洲图片家庭乱伦，三邊封口，切斷xxxx性16xx，完成包裝啊灬啊灬高潮来了视频在线观看。全機(jī)設(shè)有統(tǒng)計(jì)、收拾整頓真实处破女www、夾筷不用人的勞力停機(jī)女性视频网站,色、變頻變速等裝配。

Empty pallet stored in pallet magazine is automatically conveyed underneath the filling spout; After the bag is hung and bag mouth fastened around the filling spout manually, the bag is prepared for incoming material; Materials in the feed hopper are discharged into empty bags, then weighed by loaded pallet, weigher (standard weight 1000kg); After weighing is completed, the bag is automatically released from bag clamper and hanging apparatus in loaded pallet scale to pallet conveyors.

存貯在托盤(pán)倉(cāng)庫(kù)中的空托盤(pán)自動(dòng)輸送到裝袋位置大屁股美女久久作爱视频。人工把空包裝袋套入裝袋機(jī)下料口后人人操毛片免费看，夾袋器夾住袋口，做好接受來(lái)料的準(zhǔn)備a片射。給料箱將物料送入空包裝袋中在线播放精品，并利用垛盤(pán)電子稱稱重（標(biāo)準(zhǔn)重量1000公斤）。稱重完畢日本国产亚洲，夾帶器及垛盤(pán)電子稱上的掛袋裝置將料袋釋放到托盤(pán)上人人操人人爱乳房。