Recognition may be one or more of the specific recognition device terminals and wire terminals: a, using related products marking system to identify and actual or relative position recognition device terminals or specific wire line terminals; b, using related products marking system to identify and recognize the device terminals and specific color-coded wire terminals; c, using graphic symbols GB5465 stipulated. For the use of auxiliary symbols, should be consistent with the GB4728 graphics; d, using the alphanumeric symbols of the standard set forth in Section 5. Poor insulation insulator role is to maintain the correct position of contacts are arranged side PCB board manufacturers, and contact between the contact member and insulated from each other between the contact and the housing. Therefore insulating member must have excellent electrical properties, mechanical properties and molding process performance. Especially with the high-density PCB board side, widely used PCB board end miniaturized terminals (B1818), effective insulation thickness thinner. This insulation material, plastic injection molding and other precision molds and made more restrictive and burdensome requirements. Due to the presence of the insulator surface or inside metal extra material, surface dust, moisture flux and other pollution, and hazardous organic material precipitates gas adsorption membrane fusion with the surface film of water to form an ion conductive channel PCB board end price, absorb moisture, mildew, insulation material aging and other reasons, will cause a short circuit, leakage, breakdown, poor insulation and low insulation resistance. , Screws and steel pieces with salt spray test in question after plating, due to the company according to 2012 standard threaded plating (plating is limited, but much of the thread I think there is a corresponding coating thickness to be determined), to solve this problem Under normal circumstances, the plating process there are two ways to choose the right coating sealer and use in multiple plating, both of which are to be covered with the naked eye can not see the screw voids generated. Plating using plating in multiple high costs, it is proposed to use the first method, the key to this approach is that the research sealer formulations. PCB board end (B1611) _ Professional supplier _PCB board end by Xu Song Shi Jie Dongguan City electronic products factory provided. Dongguan Shijie Xu Chong-electronic products plant (chuangxs.1688.com) (www.chuangxs.1688.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!