A.螺紋代號(hào)、螺紋公差代號(hào)和螺紋長(zhǎng)度代號(hào) B.螺紋代號(hào)、螺紋公差代號(hào)和旋合長(zhǎng)度代號(hào) C.螺紋代號(hào)、旋合長(zhǎng)度代號(hào)和螺紋長(zhǎng)度代號(hào) D.螺紋公差、旋合長(zhǎng)度代號(hào)和螺紋長(zhǎng)度代號(hào)
A.4/5 B.3/4 C.2/3 D.1/2
A.螺栓 B.齒輪 C.彈簧 D.銷