半封闭螺杆式冷水机组
semi-hermetic screw water chiller
变频螺杆式压缩机
variable speed screw compressor
单螺杆式启闭机
single-screw open-close machine
单螺杆式水力机械
Single-screw Hydraulic Machinery
电动潜油螺杆泵
ESPCP electrical submersible progressive cavity pu
风冷型螺杆式空气压缩机
screw air compressor with aircooling