S31803 est unita numerati ratio (uns) designatio ad originale duplex immaculatam ferro. Et uni ratio creatus est per plures commercia coetus in 1970s ad redigendum confusione, cum eodem Alloy vocavit diversa, et e converso. Quisque metallum repraesentatur per epistulam secuta ab quinque numeri, ubi litterae repraesentat metallum seriem, i.e. s ad immaculatam ferro.
Steel pipe caerimonias sunt generalis terminus pro components in limbis system quod ludere in partes nexu, potestate, directionem mutatio, distinguitur, signantes et subsidium. Function: connection, direction change, shunt, sealing, support, etc. Pipe fittings are widely used in petroleum, chemical, metallurgy, medicine, heat, electric power and other industries, and are the main accessories for industrial construction.
- Zhengzhou Huitong Pipeline Equipment Co., Ltd.