Thus they can provide a clean vacuum over the entire vacuum range. Dry pumps require little maintenance and don't generate any waste material.

无油真空泵提供了完全洁净的真空环境，泵体本身无需保养，而且不会产生任何污染物。

youdao

A shuffling farmer in a flat cap and worn woollen sweater pumps furiously at the well in the courtyard of his house to show that it has run dry.

一个戴鸭舌帽穿羊毛衫走来走去(shuffling)的农夫猛烈地摇着他房子庭院里水井的摇把，以展示它已经干了。

youdao

This means that pumps could be dry turn, self-absorption and processing of high viscosity, high abrasion medium.

这就意味着泵可以干转、自吸以及处理高黏度、高磨损介质。

youdao

The study in Benin found that solar-powered pumps are effective in supplying water, especially during the long dry season.

VOA: special.2010.01.11

Pumps that were used to keep the mine dry have not been in operation since its closure.

VOA: special.2009.07.21

Machinery pumps the dry material onto the island.

VOA: special.2009.10.06

Shoppers were polite but tense as they sought food, water and gasoline from stores where shelves were quickly emptied and pumps soon ran dry.

CNN: Quake survivors look for loved ones in hard-hit area

When key workers fall ill or get afraid and low paid workers simply do not turn up for work food stores will have empty shelves, close and be looted, gas pumps will be dry and prescription drugs not delivered.

FORBES: U.S. Is Following China H7N9 Flu "Closely," Sees "Low" Int'l Risk

Sao Paulo, Brazil (CNN) -- Gas pumps in Sao Paulo, Brazil's biggest city and financial capital, were running dry Wednesday due to a truckers strike that began two days ago.

CNN: Gas pumps near empty in Sao Paulo due to truckers strike