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来源:雅诚德英语网
The utility model discloses a steel pipe elongation fastener, which is used for slightly elongating a steel pipe.
一种用于使钢管略微伸长的钢管伸长扣件。
The utility model discloses a steel pipe elongation fastener, which is used for slightly elongating a steel pipe.
一种用于使钢管略微伸长的钢管伸长扣件。