在毛主席无产阶级革命路线指引下,我国航空工业有了很大发展。但有些航空技术标准尚未制订,有关磁粉探伤的技术说明书一直沿用国外资料,存在不少问题。为了贯彻执行毛主席关于独立自主、自力更生的方针,满足我国航空工业生产和援外的需要,急需制订出我们自己的磁粉探伤说明书。根 Under the guidance of Chairman Mao’s proletarian revolutionary line, China’s aviation industry has made great progress. However, some aviation technical standards have not yet been formulated. The technical specifications for magnetic particle inspection have been used in foreign materials and there are many problems. In order to implement Chairman Mao’s principle of independence, self-reliance and self-reliance, and to meet the needs of China’s aviation industry for production and assistance, it is urgent to formulate our own magnetic particle inspection instructions. root