[机] revolving block slider crank mechanism, revolving slider crank mechanism
huí dòng huá jiàn qū bǐng jī gòu ㄏㄨㄟˊ ㄉㄨㄥˋ ㄏㄨㄚˊ ㄐㄧㄢˋ ㄑㄩ ㄅㄧㄥˇ ㄐㄧ ㄍㄡˋ