... 便携式抛光机 portable polisher 便携式钻孔机 portable borer 变动载荷 fluctuating load ...
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便携式铁路钢轨钻孔机的加工优点主要体现在降低了铁工的劳动强度，提高了工作效率。
Then the transform merit of the hold type railroad steel rail borer machine mainly embodiment lowered the Labour intensity of blacksmith, raised a working efficiency.
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