发布时间:2025-01-21 00:50:34
要26.3毫米。按照标准规定,螺纹内孔的大小等于螺纹直径减去齿距乘以系数所得。m30螺纹螺母的直径是30毫米,螺距是3.5,系数(1.04到1.08之间)取1.06,那么经过公式计算结果就约是26.3毫米。
新买的二手房屋里都收拾干净了原来房主信佛烧香香味很熏人还有中药味道放了一个星期了还有味还很浓
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