短語(yǔ)詞組短語(yǔ)reciprocating cam follower 往復(fù)從動(dòng)件reciprocating roller follower 直動(dòng)從動(dòng)件radial reciprocating follower 對(duì)心移動(dòng)從動(dòng)件 返回 reciprocating follower