Shanghai Top-Nan Machinery Co., Ltd. is an international manufacturing and trading company with several manufacture bases for over 18 years. Now our company has 1600 staff members, in which there are more than 230 engineers. We have over 640 sets high technology production equipment and testing machines. We specialize in researching and developing all kinds of specification products. Our products are manufactured with the standard strictly, which like API, ANSI, TIS, BS and DIN. On the other hand, our products get several international approvals such as CE, TUN, GS, and ISO9001 certificates. Our products are exported all over the world. We have not only the great knowledge of our products, but also the relevant international market very well. We are producing a huge OEM orders for our oversea customers. We insist on to provide our customers with suitable quality products and reasonable