lead shield 中文意思是什麼
lead shield
解釋
鉛護套-
At the initial stage of planar technique, b was employed as ideal diffusion impurity in base - region of npn si planar devices because of the match of its solid - solubility and diffusion coefficient in si with those of p in emission - region, and the good shield effect of sio2 film to b. but because of the relatively large solubility ( 5 1020 / cm3 at 1000 ) and the small diffusion coefficient, the linear slowly - changed distribution of acceptor b in pn junction can not be formed, which could not cater to the requirement of high - reversal - voltage devics. thereafter b - a1 paste - layer diffusion technology and close - tube ga - diffusion technology had been developed, while the former can lead to relatively large the base - region deviation and abruptly varied region in si, which caused severe decentralization of current amplification parameter, bad thermal stability and high tr ; the latter needed the relatively difficult pack technique, with poor repeatability, high rejection ratio, and poor diffusion quality and productio n efficiency
在平面工藝初期，由於b在硅中的固溶度、擴散系數與n型發射區的磷相匹配， sio _ 2對其又有良好的掩蔽作用，早被選為npn硅平面器件的理想基區擴散源，但b在硅中的固溶度大（ 1000時達到5 10 ~ （ 20 ） ，擴散系數小， b在硅中的雜質分佈不易形成pn結中雜質的線性緩變分佈，導致器件不能滿足高反壓的要求，隨之又出現了硼鋁塗層擴散工藝和閉管擴鎵工藝，前者會引起較大的基區偏差，雜質在硅內存在突變區域，導致放大系數分散嚴重，下降時間t _ f值較高，熱穩定性差；後者需要難度較大的真空封管技術，工藝重復性差，報廢率高，在擴散質量、生產效率諸方面均不能令人滿意。 -
For example : 1. prolonging compensation lead of precision grade connecting with k dividing code thermocouple, owning pvc insulation and sheath multi - strand conductor shield knited by tinning copper thread
例： 1 .與k分度號熱電偶連接的延長型精密級補償導師線最高使用溫度105聚氯乙烯絕緣和護套，多股絞合導體，鍍錫銅線編織屏蔽。 -
2. prolonging fireproof compensation lead of precision grade connecting with k dividing code thermocouple, owning polyvinyl fluoride insulation and sheath multi - strand conductor pairs and general shield knited by tinning copper thread, which twisted by 10 compensation pairs. nominal section of conductor is 1. 5mm
2 .與k分度號熱電偶連接的延長型耐熱精密級補償電纜聚全氟乙丙烯絕緣和護套，多股絞合導體，鍍錫銅線編織對屏加總屏， 10個補償對絞合，導體標稱截面為1 . 5mm 。 -
Lead protective shield
鉛保護罩 -
As an aid to productivity, lead developers funnel communications between the wider project team and external organizations, and shield developers from noise and random interference in their daily schedules
作為效率輔助手段，開發人員主管集中更廣的團隊項目與外部組織之間的交流，並保護開發人員避免噪音和日常安排中的隨機干擾。 -
In this case, which seems to violate the " no shield current " rule for receiver circuits, the concentric cable is not used to shield the center lead ; instead, the geometrv produces cancellation
這個例子看起來違背了上文「屏蔽體一定不能有電流」的準則，但是這里屏蔽電纜並非用來屏蔽芯線，而是通過這種特殊接法抵消干擾。 -
This can lead to lots of frantic battles to control the various missile silos, as they periodically loft up a missile that can damage the energy shield
這個特點會為了控制各種導彈發射井而引發眾多的激烈戰役，因為這些導彈發射井可以階段性地發射導彈，擊毀能量盾。
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