we are a chinese manufacturer of ex-proof products such as ex-proof airconditioner,ex-proof CCTV PTZ camera system products, explosion proof lights,ex-proof dehumidifier ,ex-proof phones.These products are used in the hazardous area for the oil, gas, petrochemical, pharmaceutical and marine industries, Nanyang Yitong Explosion Protection Electrical Group. Co. Ltd is a very large company in china, we have exported the products to the Europe,South America, Mid-east, asia. We can do the OEM production and we want to expand our business, can we become your supplier or your branch company ? hope to cooperate with you .