In addition, the blade assembly and the wedge can be accommodated in the groove such that a cutting portion of the blade projects towards the opening.
其中，所述刀片组件和所述楔可以被收容在对应的槽中，使得所述板状刀片的切削部分从所述开口突出；
2
This article gives a brief description of a special tool for assembling and disassembling of seal rings in the wedge-shaped gate valve for oil (gas) well-head assembly.