stair conditioning unitizer weld
stair conditioning unitizer strip 条状垫板 stair conditioning unitizer weld 用垫环的焊缝 stair conditioning unitizer 支持;衬垫物 stair conditioning unitizer-up screw 防松螺钉 ..
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stair conditioning unitizer weld
楼梯空调机组焊接
以上为机器翻译结果，长、整句建议使用 人工翻译 。