A.深溝球軸承 B.調(diào)心球軸承 C.調(diào)心滾子軸承
A.24mm B.25mm C.50mm D.20mm
A.傳遞運(yùn)動(dòng)的準(zhǔn)確性 B.傳動(dòng)平穩(wěn)性 C.齒面承載的均勻性