vacuum back

Zone Back pressure Control Using for Vacuum Carriers in CMP

CMP加工中的真空吸盘区域压力控制技术

Soft subsoil at the back storage yard was treated by vacuum combined with water surcharge preloading.

温州港七里港区后方堆场软基采用真空加水载联合加固处理.

The cheese dates back to 1615BC and wasessentially vacuum-packed with the bodies of the mysterious Bronze Age peoplewho were buried in the Taklamakan Desert, making it the oldest ever recovered.

该奶酪可追溯至公元前1615年，真空包装在神秘的青铜时代的人物身上，被埋葬在塔克拉玛干沙漠中，这是目前为止发现的最古老的奶酪。

Comparing the separate explosion and the electrical feed back of switch to the air type with the separate explosion and the electrical feed back of vacuum switch with the intelligent type;

对空气型隔爆馈电开关和智能型隔爆真空馈电开关进行了对比；

This paper establishes a physical modle of carburettor vacuum when an engine is in cold condition and low revolutions, In cold cranking state and idle motion state a calculation about the changes of carburettor vacuum at the back of air choke and throttle valve is finished.

本文建立了在发动机冷车低速时化油器真空度的物理模型，计算了冷起动工况和怠速工况下阻风门与节气门后的真空度变化情况。