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支架(4)支撑着整个梯级,踏板(3)固定在支架(4)的上端。
The bracket (4) supports the entire steps and the tread plates (3) are fixed at the upper end of the bracket (4).
youdao
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支架(4)支撑着整个梯级,踏板(3)固定在支架(4)的上端。
The bracket (4) supports the entire steps and the tread plates (3) are fixed at the upper end of the bracket (4).
youdao