The Model 1600a precision vacuum regulator features control sensitivity of 1 water column and a balanced supply valve for high precision.

示范1600a精密真空调节器控制1敏感性水柱和高精度供求平衡的阀门。

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The gravity of this water column continuously produces the vacuum and so a vacuum pump is not needed.

水柱的重力不断地引起真空，所以真空管是不需要的。

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A vacuum distillation column relates to a sulfolane distillation device in equipment for producing sulfolane.

真空精馏塔涉及一种生产环丁砜设备中的环丁砜精馏装置。

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However with the introduction of lighter weight and more flexible plastic substrate magnetic tapes, combined with a vacuum column to control the tension that the magnetic tape experiences during use, the IBM 726 was a prototype of the modern digital tape recording system.

FORBES: Magnetic Tape Turns 60