tree support

基本解释失架

网络释义

1)tree support,失架2)frame instability,框架失稳3)destable condition of support,支架失稳条件4)Lose steadiness out of roof truss ptane,屋架平面外失稳5)Three planes were lost.,损失3架飞机。6)Instability Type of Frame,框架失稳类型

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