【摘 要】
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张师傅蹲在平整的地上,捣腾着手里的图纸、卷尺、铅笔和绳墨,他正在勾画着一个图形。这时,技术员走了过来,站了一会儿。十几分钟的时间,一段楼梯的剖面被勾勒出来。张师傅拉
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张师傅蹲在平整的地上,捣腾着手里的图纸、卷尺、铅笔和绳墨,他正在勾画着一个图形。这时,技术员走了过来,站了一会儿。十几分钟的时间,一段楼梯的剖面被勾勒出来。张师傅拉出卷尺,量取了梯段的长度和休息平台的长度,一一记下。“为什么张师
Master Zhang crouched on the flat ground, squatting his hands on the drawings, tape measure, pencil and rope ink, he is drawing a graphic. At this moment, the technician came and stood for a moment. Ten minutes, a section of the stairs profile is outlined. Master Zhang pulled out the tape measure, taking the length of the bench and resting the length of the platform, one by one down. ”Why Zhang
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