天天舔天天爽_视频日韩_成人网线_天天草草草_免费一级在线观看_色综合色综合色综合色综合

美國 Welch Vacuum  

 Welch是一個全球性的真空泵系統和組件的生產商。

 Welch為實驗室、工業和教育領域提供高質量的真空泵已經超過一個世紀。今天,Welch是真空泵、化學和生物實驗室、高真空制造、空調/制冷的領先的制造商。

 韋爾奇的產品線包括油潤滑回轉葉片真空泵,干燥的活塞和隔膜真空泵,和專業的真空系統、組件和應用程序。

Welch has provided quality vacuum pumps for laboratory, industrial and educational applications for over a century. Today, Welch is a leading manufacturer of vacuum pump products for chemical and biological laboratories, high vacuum manufacturing, and air-conditioning/refrigeration.

The Welch product line includes oil lubricated rotary vane vacuum pumps, dry piston and diaphragm vacuum pumps, and specialized vacuum systems, components, and applications.