نمایش نتیجه 1 تا 2 از 2 نتیجه یافت شده برای hoisting components:
n pi: drawworks, drilling line, and travelling and crown blocks. Auxiliary hoisting components include catheads, catshaft, and air hoist.
n: the system on the rig that performs all the lifting on the rig, primarily the lifting and lowering of drill pipe out of and into the hole. It is composed of drilling line, travelling block, crown block, and drawworks. See also hoisting components.
© ۱۳۹۲-۱۳۹۷ این اثر شامل قانون حمایت از مولفین بوده و هرگونه کپی برداری از آن ممنوع است.
