Air defense door product samples detection methods: the first production of air defense projects protective equipment sample quality air defense doors, must be approved by the National People's air defense protective equipment product quality inspection agency (located in the General Staff Corps of four) to detect specific method is: the enterprise required to produce air defense protective equipment engineering samples, inform the province, autonomous regions and municipalities Civil Defense Association (no air defense associations to inform the provincial People's Air Defense Office UNRWA) air defense doors, while Chinese newspaper People's Air Defense Survey and Design and Underground Space Association Branch (referred to as the people's air defense and underground space branch). Underground civil air defense and space arrangements at the national branch of civil air defense protective equipment product quality inspection agency coordinating the local Civil Defense Association and the relevant technical units, agencies of the samples tested, the test report issued by the end of the post-test, reported People's Air Defense and Underground Space branch. Henan Jin Sheng air defense Equipment Co. in 2014 by the people of the new air defense and air defense underground space branch detection gate door manufacturer credibility air defense manufacturer, may Baidu search for "air defense Equipment Co., Henan Sheng-chun," to understand the company details. Air defense door code BHSFM What does it mean? BHM and HHM, the first B and H What is the difference? Air defense doors divided into two series: one is the fourth and Design Institute of the General Staff Corps of Engineers and the China Academy of Building Standard Design developed the door; the other is beginning with the letter B, are the Ministry of Construction is representative of the type of door B standard meaning at the beginning of the B doors are the Ministry of Construction, H is a low threshold mean air defense on behalf of the living door price, F represents the protective means, M represents the mean closed, S is a dual-fan K is intended to open the door and outside the meaning of . Ministry of Construction, Ministry of Construction BHM is sill alive RC closed doors. HHM's first H representative of reinforced concrete, and the second threshold H represents a living, HHM is confined reinforced concrete door sill alive. For air defense doors specific situation, please contact the Civil Air Defense Equipment Co., Ltd. Henan Sheng Tianjin, Tianjin, Henan Sheng can Baidu search air defense Equipment Co. Contact Info. Air defense credibility door manufacturers, Jin Sheng air defense (certified), Luohe City, Henan air defense provided by Jin Sheng door air defense equipment Limited. Civil Air Defense Equipment Co., Ltd. Henan Sheng-chun (www.jsrenfang.com/) is Zhumadian, other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Jin Sheng air defense leadership with the staff warmly welcome all inquiries negotiations to create Jin Sheng air defense a better future.