The adjustable suction pot comprises a suction pot, a guide tube, an air extracting device and an adjusting valve.

本实用新型由吸罐、导管、抽气装置、调节阀组成。

youdao

The adjustable suction pot comprises a suction pot, a guide tube, an air extracting device and an adjusting valve.

本实用新型由吸罐、导管、抽气装置、调节阀组成。

youdao