型号 范围543-251（391）0.5X12.7MM/0.001MM543-251B(391B)0.5X12.7mm/0.001MM543-271(401) 0.5X12.7mm/0.01MM543-271B(401B)0.5X12.7mm/0.01MM543-451B(471B)1X25MM/0.001MM543-455B(475B) 1X25MM/0.01MM543-461B(491B) 2X50MM/0.001MM543-465B(495B)2X50MM/0.01MM543-551E0~25MM/0.01MM543-552E1X25.4MM/0.001MM543-553E 0~50MM/0.01MM543-554DC(E)2X50.8MM/0.001MM543-561E 0~30MM/0.001MM543-562E0~30MM/0.001MM543-563E0~60MM/0.001MM