precision steel meaning in English

精密仪器用钢

Standard test method for linear measurement using precision steel rule
用精密钢尺进行线性测量的标准试验方法
Specification for examination of the surface texture of precision steel castings
精加工钢铸件表面结构检验规范
Iso plain end welded precision steel tubes - technical conditions for delivery iso specifications
光端焊接精密钢管.交货技术条件
Iso plain end seamless precision steel tubes - technical conditions for delivery iso specifications
光端无缝精密钢管.交货技术条件
Iso plain end as - welded and sized precision steel tubes - technical conditions for delivery iso specifications
焊后定径光端精密钢管.交货技术条件

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