The formation mechanism of the absolute instability and gyrotron backward wave oscillations is analyzed, and the methods to suppress the parasitical modes are discussed.The nonlinear theory model of gyro-TWT is consummated by considering the influence of tapered magnetic field and waveguide radius, electron velocity spread, and waveguide loss on electron beam-wave interaction. The large-signal characteristic of gyro-TWT, such as launching loss and absolute instability, are also analyzed in detail. This work establishes the foundation for the development of a gyro-TWT amplifier.

重點(diǎn)研究了兩段損耗波導(dǎo)結(jié)構(gòu)和損耗陶瓷結(jié)構(gòu)回旋行波管中的電子注-波互作用菊花奴隶人妻品评会，分析了絕對不穩(wěn)定性和回旋返波振蕩的形成機(jī)制和抑制寄生模式的方法欧美中文字幕伦交视频；完善了回旋行波管的非線性理論模型91精选自拍，并考慮了磁場和波導(dǎo)半徑漸變亚洲国产黄色视频在线观看、速度零散、波導(dǎo)損耗等因素對注-波互作用的影響亚洲男人综合天堂；詳細(xì)分析了發(fā)射損耗在线免费中文字幕、相位穩(wěn)定性等回旋行波管的大信號特征，為回旋行波管放大器的研制奠定了基礎(chǔ)av网页在线。

ABSTRACT:OBJECTIVETo study the correlation between anatomic structure of the inferior alveolar nerve canal and dental implantation by measuring mandible innervation esemplarsMETHODSThe intramandibular course of mandibular canal and its dimendion were measured in 15 mandibles with teeth; the relationship between blood vessel and nerve was observed in 5 fresh samples in which the artery was filled; and then the data were analyzed by statisticsRESULTSThe mandibular canal was close to the lingual side and the inferior margin of the mandible, the mandibular canal and the 10mm underside of mandible were parallel in the region of the first and the second molars, it runned outboard to genal aperture when it was hereabout genal aperture, and the blood vessel lay above nerve in the mandibular canalCONCLUSIONIn implant operation performed according to normal anatomy, injury to inferior alveolar nerve may be avoided.

［目的］探討下頜管的解剖結(jié)構(gòu)與牙種植的關(guān)系［方法］選取15具牙列完整的成人離體下頜骨標(biāo)本和5具經(jīng)過動脈血管內(nèi)灌注的新鮮標(biāo)本www.206p.com，測量下頜骨在每個牙位截面上有關(guān)牙槽嵴及下頜管的相關(guān)數(shù)據(jù)，進(jìn)行統(tǒng)計學(xué)分析［結(jié)果］牙槽嵴頂以及下方10mm寬度由前向后逐漸增寬可以直接看的A片；牙槽嵴由上向下逐漸增寬久久只有这里视频；下頜管位于下頜骨體內(nèi)下方走行中偏舌側(cè)国产主播第一页，并近下頜骨下緣，在下頜第1女人自啪啪一级毛片，2磨牙區(qū)下頜管走行與下頜下緣成平行狀美女福利国产精品免费观看，在近頦孔處轉(zhuǎn)向外和向頰側(cè)出頦孔；下頜管內(nèi)血管位于下牙槽神經(jīng)之上［結(jié)論］牙種植術(shù)中按正常解剖部位并且側(cè)重頰側(cè)骨板操作欧美色精品视频欧美精品色，可避免損傷下牙槽神經(jīng)女人被叉视频；如果術(shù)中下頜管內(nèi)突然涌出大量新鮮血液，則提示若繼續(xù)手術(shù)可能損傷下牙槽神經(jīng)久99久人碰人。

ABSTRACT:OBJECTIVETo study the correlation between anatomic structure of the inferior alveolar nerve canal and dental implantation by measuring mandible innervation esemplarsMETHODS The intramandibular course of mandibular canal and its dimendion were measured in 15 mandibles with teeth; the relationship between blood vessel and nerve was observed in 5 fresh samples in which the artery was filled; and then the data were analyzed by statisticsRESULTSThe mandibular canal was close to the lingual side and the inferior margin of the mandible, the mandibular canal and the 10mm underside of mandible were parallel in the region of the first and the second molars, it runned outboard to genal aperture when it was hereabout genal aperture, and the blood vessel lay above nerve in the mandibular canalCONCLUSIONIn implant operation performed according to normal anatomy, injury to inferior alveolar nerve may be avoided.

［目的］探討下頜管的解剖結(jié)構(gòu)與牙種植的關(guān)系［方法］選取15具牙列完整的成人離體下頜骨標(biāo)本和5具經(jīng)過動脈血管內(nèi)灌注的新鮮標(biāo)本免费一级黄色，測量下頜骨在每個牙位截面上有關(guān)牙槽嵴及下頜管的相關(guān)數(shù)據(jù)，進(jìn)行統(tǒng)計學(xué)分析［結(jié)果］牙槽嵴頂以及下方10mm寬度由前向后逐漸增寬欧美独黄色网站；牙槽嵴由上向下逐漸增寬日韩视频日韩精品视频在线观看；下頜管位于下頜骨體內(nèi)下方走行中偏舌側(cè)奶头又大又白喷奶水av，并近下頜骨下緣插插黄色网站，在下頜第1，2磨牙區(qū)下頜管走行與下頜下緣成平行狀色色婷婷网，在近頦孔處轉(zhuǎn)向外和向頰側(cè)出頦孔国产曰韩一区二区三区；下頜管內(nèi)血管位于下牙槽神經(jīng)之上［結(jié)論］牙種植術(shù)中按正常解剖部位并且側(cè)重頰側(cè)骨板操作，可避免損傷下牙槽神經(jīng)www.日韩；如果術(shù)中下頜管內(nèi)突然涌出大量新鮮血液香蕉视频网站，則提示若繼續(xù)手術(shù)可能損傷下牙槽神經(jīng)。

Because every are folded,flow board standard limit and elliptical long gross ril load close or parallel, and with a center of the each canal hole that the triangle forms cloth to be in charge of connects line parallel; another edge also with the Guan Kongzhong of another direction the heart connects line parallel, the fixed position that consequently its provide opening is underlined and make easy implementation.

由于每塊折流板的基準(zhǔn)邊和橢圓之長軸重合或平行亚洲另类中文字幕，并和正三角形排列布管的各管孔的一條中心連線平行666黄色网站；另一條邊也和另一方向的管孔中心連線平行，因而其管孔的定位劃線和制造輕易實(shí)現(xiàn)亚洲综合无码精品一区二区三区。

METHODS: Sixty-nine extracted mandibular first premolars and 93 mandibular second premolars were used.Radiographs of teeth in mesiodistal direction were taken.

離體第一前磨牙69個精品精品国产高清A级毛片3d，第二前磨牙93個，攝近中遠(yuǎn)中向的X線片国产盗摄在线精品福利，用Photoshop5.0軟件分析根管美女被草逼一级A片视频，用Weine氏法測量根管的彎曲度，測量角度大于18度時思思热国产精品视频，則認(rèn)為根管存在明顯的彎曲日韩久久性欲片，根管的構(gòu)型采用Vertucci分類法。

When working on the Ex area, the first that contractor shall considered is the connection between couduits and connection between conduit with junction box, pull box. The connection between those part shall be kept a contiunous electricity. Secondly, when the cable connected to the pull box, ex-proof type connector shall be installed.

14.3.2.1 由于是在防爆區(qū)学生妹人人操人人干人人，因此電纜管的安裝首先要考慮的因素之一是電纜管之間及電纜管與接線箱91日韩一区、穿線盒、電纜橋架之間的連接應(yīng)保持良好的電氣連續(xù)性并進(jìn)行接地黄色视频在线任意观看，此外中国农村熟妇ⅩXX，電纜管在與接線箱連接時3p视频免费视频，必須安裝防爆密封接頭。

Rubber trees initiate laticifer differentiation in June and July while no laticifer differentiation occur during the periods from November to May under natural conditions on Hainan Island. Application of jasmonates induced laticifer formation in both immature and mature rubber trees. Tapping and/or pre-tapping enhanced the ability of vascular cambia to differentiate the secondary laticifers.

結(jié)果表明熟女91拍，在海南島自然條件下亚洲美女喷水啊啊啊，乳管分化開始于6~7月份，在11月～翌年的5月沒有乳管分化亚洲人人操人人操；割膠包括正式割膠前的預(yù)割能顯著提高橡膠樹形成層分化乳管的能力久久机热免费，其影響的范圍相當(dāng)大；外施茉莉酸對未開割樹和割膠樹的乳管分化都有促進(jìn)作用夫妻人人摸人人操人人射。

The fired heater comprises a radiant section enclosure with a number of U tubes in the radiant section. The U tubes are formed by connecting one or more tubular sections, and the U tubes are provided with internal generally longitudinal fins.

燒制的加熱器包括一帶有多個在輻射部中的U管的輻射部室亚欧日韩国产视频。U管通過將一個或多個管狀部相連而形成，而且U管設(shè)有內(nèi)部的通常為縱向的翼片亚洲aaaa中文字幕。

The results indicate that the difference between the Y-shaped CNT and the pristine one is remarkable due to the influence of the defects in the junctions of the former.

研究結(jié)果表明啦啦啦www在线观看，由于缺陷環(huán)的影響，Y型碳納米管與直型管的性質(zhì)明顯不同欧亚三级片，而且久久精品视频63，Y型碳納米管的結(jié)構(gòu)和性質(zhì)與分支管長度存在一定的關(guān)系。

The equivalent stress nephograms, the variation rule of pipe displacement and stress on the bellow pipe under expansion were obtained. It was found that the stress and strain of the pipe were symmetrically distributed over the geometric shape of the pipe,the equivalent stresses and equivalent strains at different points of the pipe varied with the curvature radius.

模擬了井眼中波紋管的膨脹變形www日韩一区二区在线播放，得到了波紋管施工加壓膨脹和井壁接觸過程中的等效應(yīng)力分布云圖国产中文无码在线观看、波紋管的位移、應(yīng)力變化規(guī)律狼友网在线观看，以及波紋管膨脹后和井壁的接觸狀況污色视频网站免费进。