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两孔距钻模板大多采用一块板制成,两孔中心距固定,不可调整。为适应生产需要,经简单改变其结构(见图),两孔
Two holes from the drill template mostly made of a plate, the center of the two holes fixed, can not be adjusted. In order to meet production needs, after a simple change in its structure (see photo), two holes