这是我写的发信 请神指导一下啊！！！！！！1Its very glad to inform you that we are the exporter and manufacture of steel pipes, specialized on casing pipes，pup joints, coupling pipes and get internationally certified with API 5CT & 5L, ISO 9001: 2008, ISO 14001: 2004, OHSAS 18001 and even GOST Standard (Russian standard) We he do this line for more than five years and get the reputation from the customer around the world.If there is any demand of it just call me when you free pls and it will be the best serve .[收起]