A.12 B.13 C.6 D.11
A.頭數(shù) B.直徑 C.中心距 D.標準模數(shù)
A.蝸輪端面模數(shù)大于蝸桿軸向模數(shù) B.蝸輪端面模數(shù)小于蝸桿軸向模數(shù) C.蝸輪端面模數(shù)等于蝸桿軸向模數(shù) D.蝸輪軸向模數(shù)等于蝸桿端向模數(shù)