PVA Ported Vacuum Advance

The ignition-distributor vacuum-advance mechanism advances the spark during part-throttle operation.

分電器點火真空提前裝置在節氣門部分開啟期間，使火花提前發出。

vacuum-controlled ignition advance

真空控制式點火提前

vacuum advance control valve

真空點火提前控制閥

vacuum automatic spark advance device

真空式自動提前點火裝置

"On the full-vacuum-control distributor, the spark advance should be checked and adjusted, as necessary. The distributor should be lubricated periodically."

必須對全真空控制分電器的點火提前裝置進行檢查和調整,分電器也應定期進行潤滑保養。

Measures Research of Utility-type Unit Condenser Vacuum Improvement;

大型電站凝汽器真空提高的方法研究

Process research of icrowave-vacuum drying for Chinese herbs extracts

中藥提取物的微波真空干燥工藝研究

MEASURES FOR ENHANCING VACUUM IN OPERATION OF CONDENSER

300MW機組提高凝汽器運行真空的措施

Study on defluorination for purifying phosphoric acid by vacuum steam stripping

真空汽提法脫氟凈化濕法磷酸的研究

Improving vacuum in BEPCⅡ synchrotron radiation ring with titanium sublimation pump

用鈦升華泵提高BEPCⅡ同步輻射環真空度

A Research of the Causes of the Vacuum Leak in Steam Turbine and of Measures of Improvement;

汽輪機真空系統漏空原因及提高嚴密性的措施

Simulation and optimization of the suction system of vacuum sweeper with a front-mounting dust collection box

前裝卸式真空清掃車吸塵系統仿真與優化

Simulation of Surface Charging Phenomena on Insulator Prior to Flashover in Vacuum

真空中絕緣子閃絡前表面帶電現象的仿真研究

vacuum-assisted front disc

真空助力式前輪盤式制動器

Connect all previously removed vacuum hoses.

連接所有以前拆去的真空軟管。

In a vacuum, gamma rays travel in straight lines with the speed of light.

真空中，γ射線以光速沿直線前進。

The absoluteness of vacuum standard deteriorates with lowering of its pressure.

隨著真空度的提高，真空度計量標準的絕對性越來越下降；

The Influence and Improving Measures of Water Jet Condensation Vacuum Pump on Vacuum Drying System

水噴射真空冷凝泵對真空干燥系統的影響及提高措施