?合金活顶尖

... alloy junction transistor 合金结晶体管 alloy latch 合金弹簧锁 alloy live center 合金活顶尖 ...

?合金弹簧锁

... 合金弹簧钢 alloy spring steel 合金弹簧锁 alloy latch; alloy live center 超级铝镁合金 supermagaluma ...