NINGBO SINO-RESOURCE IMP. & EXP. CO.,LTD. is a subsidiary of SINO-RESOURCE Group. Many of our products, such as MAPP GAS, refrigerant, refrigeration oil, welding torch, compressor (group) and so on, have been granted CE certification, UL certification, ISO9001 international quality system certification, so as to ensure the brand, quality and stability of our products.