نمایش نتیجه 1 تا 2 از 2 نتیجه یافت شده برای tong hanger:
n: a weight placed in the derrick or under the rig floor that is attached by means of wire rope to the tong hanger. Each set of tongs has a counterbalance to ensure that they hang at a convenient height above the rig floor.
n: a relatively long narrow steel projection bolted to the tong arm to which wire rope is attached;suspends the tongs in the derrick.
© ۱۳۹۲-۱۳۹۷ این اثر شامل قانون حمایت از مولفین بوده و هرگونه کپی برداری از آن ممنوع است.
