Which big brother has a negative pressure drainage standard ah, pass me a reference, very grateful!
he bottom of the drainage container opens the pour outlet and the pouring outlet is fitted with a plug.
The anti-backlash clip provided on the drainage tube can effectively prevent the occurrence of the reflux; the pouring outlet is arranged at the bottom of the telescopic negative pressure drainage container, and the pouring is not only easy to be poured out, Accurate measurement.
The utility model discloses a disposable anti-reflux negative pressure drainage device, which comprises a telescopic negative pressure drainage container, a telescopic negative pressure drainage container is connected with a drainage pipe, an anti-return clamp is arranged on the drainage pipe,
