Flanged valves calculated for additional layinglength of flanged valve.
法兰阀门流量系数值计算时考虑到法兰阀门的放置长度。
2
The layinglength of the body and the heavy-duty modified-acme threads in the union connections to the body have not changed in the 30-year history of the valve.
这种阀门问世30多年来，其阀体长度和管套接连接件上的强力改进顶点螺纹始终没有改变。
3
First, he laid the floor under the direction and length to allow the laying of the keel position.