when working, little amount of water can enter into a water tank on a connecting sleeve to play a lubricating function for connecting tubes and connecting sleeves.
在工作时,联接套上的水槽可进微量水对联接管和联接套起润滑作用。
the fluted disc on the connecting sleeve is contacted and glide with the diagonal face to form zero return stroke. the speed of tweaking screws is high.