光合作用的作用光谱
action spectrum of photosy nthesis
矿用钢丝绳的计算选择
Mining the Choice of Calculation of Wire Rope
线缆行业的作用及对技术进步的推动
role of the cable industry as a whole and its promotion to the technical development
油建作业钢丝绳
wire rope for oil well construction
OTIS电梯用钢丝绳
wire rope for OTIS elevator
操纵用钢丝绳
Steel wire ropes for control
抽油用钢丝绳
Wire Rope for Pumping Oil
电梯用钢丝绳
Wire Rope for Lift
steel wire rope for elevator
Wire Rope for Elevator
Steel wire ropes for elevators
钢丝绳用压板
Clamping plates for fixing steel wire ropes
港口集装箱用钢丝绳
Wire Rope for Seaport Container
港口装卸用钢丝绳
wire rope for port loading and unloading