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| reference engineering photo template (它是一个被复制在聚酯薄膜或金属板上的精确的全尺寸的图纸，能够测量这些图纸的尺寸，该图无尺寸，工人在图上仅放置一刻度尺即可直接传递尺寸，在图面上有相隔10英寸的坐标方格线为测量基准) | |||
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