北方航空材料研究院生产ＭＳ２１９１９环形支撑紧固件是该院与美国ＴＡ 公司的一项合作的结果。前者是想通过合作逐步扩大卡箍紧固件专业化生产的能力，后者则想深入向中国的航空航天工业领域引进各种先进的卡箍设计和相关产品。 年１１月，我们在珠海举行的第三届 航空航天博 The Northern Aviation Materials Research Institute’s production of MS21919 annular support fasteners is the result of a collaboration between the hospital and the American TA company. The former intends to gradually expand the capabilities of professional production of clamp fasteners through cooperation, while the latter wants to introduce various advanced clamp designs and related products into China’s aerospace industry. In November of this year, we held the third aerospace expo in Zhuhai.