access stairway 中文意思是什麼
access stairway
解釋
外部樓梯通道-
Building site equipment - ladder or stairway type building site access towers - materials - dimensions - calculation loads - resistance and safety requirements - tests
建築工地設備.建築工地用梯級式或樓梯型輔助吊塔.材料.尺寸.負荷計算.耐用性和安全要求.試驗
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