力天
603(3*9*3/5mm),604(4*12*4mm),605(5*14*5mm),606(6*17*6mm),607(7*19*6mm),608(8*22*7mm),609(9*24*7mm)
上海龙凤13144,6,3,5,7,8,9(mm)
上海龙凤131412,22,9,14,24,17,19(mm)
1(kg)
PTFE
氧化锆(ZrO2)
P0