给你的耳朵一些假期吧! 

FRONTAL WINDOWS FOR CONVENIENT OIL LEVEL CHECK

Sliding opening to quickly check the oil level without having to lift the cover of noise enclosure. 

OTHER FEATURES
indicator light for operating statut of vacuum pump enclosure
工作状态指示灯
VACUUM TUBING AND CABLES GROMMET
全球适配电源
GRANT YOUR EARS SOME HOLIDAYS !