1.strength of top-stop
2.Strength of slider locking Device
3..Strength of puller attachment
4..Strength of closed-end
1.strength of top-stop
2.Strength of slider locking Device
3..Strength of puller attachment
4..Strength of closed-end
1 (拉链的)上止强度
2 拉头强度
3 拉链装置的强度
4 拉片附着强度