Higher CZPT Screw Pump/progressive cavity screw pumpThe twin screw pump is a pair of intermeshing screws...
double screw
Double Asphalt Bitumen Screw Pump
错误：获取返回内容失败，您的会话已过期。请重新认证。
Higher CZPT Screw Pump/progressive cavity screw pumpThe twin screw pump is a pair of intermeshing screws...
错误：获取返回内容失败，您的会话已过期。请重新认证。
ZH 
AR 
EN 
FR 
DE 
IT 
JA 
KO 
PT 
RU 
ES