词头的使用
发布时间：2019-01-30 20:21
【摘要】：正1. 词头用于构成倍数单位(十进倍数单位与分数单位),但不得单独使用。2. 不得使用重叠词头,比如只能写nm,而不能写mμm。3. 组合单位的倍数单位一般只用一个词头,并尽量用于组合单位中的第一个单位。通过相乘构成的组合单位的词头通常加在第一个单位之前,例如:力矩的单位kN·m,不宜写成N·km;通过相除构成的组合单位,或通过乘和除构成的组合单
[Abstract]:Regular 1. The prefix is used to form multiple units (decimal multiple units and fractional units), but may not be used alone. 2. Do not use overlapping headers, such as nm, instead of m 渭 m.3. Multiple units of combinatorial units are generally used with only one header and are used as far as possible for the first unit in a combinatorial unit. The head of a combination unit formed by multiplying is usually added before the first unit, for example, the unit kN m of the moment, which is not suitable to be written as a combination unit composed of N km; by division, or by multiplication and division
【分类号】：TB91
本文编号：2418471
[Abstract]:Regular 1. The prefix is used to form multiple units (decimal multiple units and fractional units), but may not be used alone. 2. Do not use overlapping headers, such as nm, instead of m 渭 m.3. Multiple units of combinatorial units are generally used with only one header and are used as far as possible for the first unit in a combinatorial unit. The head of a combination unit formed by multiplying is usually added before the first unit, for example, the unit kN m of the moment, which is not suitable to be written as a combination unit composed of N km; by division, or by multiplication and division
【分类号】：TB91
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