Common quality problem occurred in China made steel pipe mainly involved in surface quality, dimension deviation, chemical composition, mechanical properties and quality inspection, etc.
国产钢管常见的质量问题主要表现在表面质量、尺寸偏差、化学成分、力学性能和质检等方面。
After modified design, the M-827 measuring rule used to measure step diameter can measure the actual dimension deviation of machined parts directly and quality of the parts is improved too.
改进设计的M—827止口直径测量尺能够直接测量出被加工零件的实际加工尺寸偏差，提高零件加工质量。
After modified design, the M-827 measuring rule used to measure step diameter can measure the actual dimension deviation of machined parts directly and quality of the parts is improved too.
改进设计的M—827止口直径测量尺能够直接测量出被加工零件的实际加工尺寸偏差，提高零件加工质量。
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