vacuum form

Orotron using two mirrors to form opening cavity is an effective vacuum electronic device in millimeter and submillimeter wave bands.

采用双反射镜构成开放式谐振腔的奥罗管（Orotron），是一种有效的毫米波和亚毫米波真空电子学辐射源。

In the multistation exhaust system a mechanic pump is used as the backing pump and molecular pump as the main integral part to form a high vacuum system.

由机械泵为前级泵，分子泵为主抽泵构成高真空系统，对高压开关管进行真空排气；

Plywood bent to the shape of a styrofoam form for vacuum forming.

用于真空成型法而弯曲成泡沫形状的胶合板.

China is now capable of building the world's first underwater vacuum tube train, a futuristic form of transportation that can achieve supersonic speed and reduce airborne noise, according to Chinese academics and scholars.

据中国的学者和学术研究人员表示，中国现在有能力建设世界上第一条水下真空管列车--这种未来的交通方式，其速度可以超过音速、且能大幅度降低噪音。

Make a test on vacuum filtrating dewatering agent with eight kinds of macromolecule flocculating agent and an analysis of the relations between the agent, the time of slime filtrated to form cake, thickness of the filtrated cake and moisture of filtrated cake.

采用了8种高分子絮凝剂，对细粒煤泥进行真空过滤脱水药剂试验；分析了药剂与煤泥过滤成饼时间、滤饼厚度、滤饼水分之间的关系。