HB 4381-1989 套筒扳手组件.pdf HB 3989-1987 套筒六角扳手.pdf HB 3918-1987 滚花扳手螺母.pdf HB 3039-1989 单头开口扳手（片状） S＝3.2～12.pdf HB 1661-1987 套筒六角扳手.pdf HB 1660-1987 弯柄六角扳手.pdf