英制螺纹m美国的老螺纹、UN统一螺 的国家,不允许在图面上直接标注国外的标准纹、UNJ航空螺纹)在我国已消失多年,但目前 符号和代号,因此采用英制后,相应的零件图,正随着对外技术合作、产品引进以及三来加工 工装、工艺图等都要进行变通(编企标),但变通等渠道渗透到我们航空行 The British thread m old thread of the United States, the United States unified screw country, does not allow direct marking on the map surface foreign standard lines, UNJ aviation thread) has disappeared in our country for many years, but the current symbol and code, so after the British system, the corresponding The parts drawings are being modified (for example, corporate standards) along with external technical cooperation, product introduction, and third-time processing tooling, process drawings, etc., but other channels have penetrated into our airlines.