crownblock 中文意思是什麼
crownblock
解釋
天車-
Control of the technological indexes in the steel crownblock beam manufacture
天車鋼梁製做工藝指標控制 -
The rigs indlude special carrier ( developed by our company ), engine, hydraulic transmission, right angle gearbox, single ( double ) drum drawwork, rotary table transmission box, hydraulic drawworks, front and rear supporting frame, double - section hydraulic telescopic mast, crownblock, travelling hool, weight indicator, hydraulic, pneumatic and electrical system, etc
專用底盤為載車，由專用汽車底盤、發動機、液力變速箱、角傳動箱、單（雙）滾筒絞車、轉盤傳動箱、液壓絞車、前支架、后支架、雙節液壓伸縮式井架、天車、游車大鉤、指重表、液壓系統、氣路系統、電器系統等組成。
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