| 牌子的名字 |
XZJS |
| 出生地 |
Shanghai China (Mainland) |
| 材料 |
spring steel |
S bed spring hot sale in world Feature of bed srping and s springs: 1)Elastic fatigue Test :Though different ways by clients . 2)Heat treatment :scientific and standard to meet the best elasticity 3)spring pitch : small ,middle,large on requests