The interior of the tube must be kept a hard vacuum to preserve the photo cathode.
显象管内部一定要保证高真空才能保护光电阴极。
The Givin hail from the planet Yag'Dhul, a world with a complex moon system that often causes tidal upheavals exposing areas of Yag'Dhul to the hard vacuum of space.
吉文人来自亚格杜尔星（Yag'Dhul）。这颗行星有复杂的卫星系，经常如潮汐般引发地质隆起，把亚格杜尔星的某些区域暴露在真空的外层空间里。
Shooting a million miles or more out into the hard, cold vacuum of space, this fiery halo is one of the wonders of the universe.
炽烈的光晕向冰冷无情的太空抛出近百万公里，这是一出让人类望而生畏的宇宙奇观。
In this paper, briefly introduce the operation principle to control the vacuum stability with the computer on slice and the detail method of hard and soft ware.
本文简要地介绍了利用单片机实现真空度稳定控制的工作原理，阐述了软、硬件的具体实现方法。
With high quality shale as raw material, the products are extruded by hard plastic vacuum technology and sintered in tunnel kiln by fuel gas with stable high temperature.
产品采用优质页岩为原料，经硬塑真空挤压成型，在隧道窑中用燃气恒定高温烧结而成。
This brick machine is a new type all-steel hard shaping vacuum extruder of our company.
该机是我公司研制开发的新一代组合型全钢硬塑真空挤砖机。
Conclusions Low energy and high vacuum phacomulsification combined with crush and chop technique for hard nucleus cataract is safe, quick and effective.
结论采用新型碎核刀的挤切碎核技术，高负压、低能量超声乳化对于硬核性白内障安全、快捷。
DCF can provide a series of soft and hard shaped products of ceramic fiber by the technique of vacuum forming.
以耐火纤维为原料，采用真空成型工艺，可设计生产多种型号的软硬制品。
The contact part of vacuum tank with the juice are using high quality stainless steel and medium hard rubber consumption.
真空脱气机与果汁接触部分均用优质不锈钢和中硬食用橡胶制成。
The contact part of vacuum tank with the juice are using high quality stainless steel and medium hard rubber consumption.
真空脱气机与果汁接触部分均用优质不锈钢和中硬食用橡胶制成。
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