“卡圈 ,曲臂,转轴,作动筒”when translating into English,they are;

“卡圈 ,曲臂,转轴,作动筒”when translating into English,they are;

A."collar,crank,pivot,actuator

B.actuator,crank,collar,pipe

C.collar,crank,actuator ,pivot

D.pivot,actuator,collar,crank

正确答案是A