spring balancing sash的意思|示意
美 / /
英 / /
弹簧平衡窗扇
spring balancing sash的网络常见释义
弹簧秤 弹簧秤 spring balance scale; spring balancer; spring balancing sash; spring dynamometer; spring scales; springbalance 弹簧窗 federfenster spring window spring pocket .