国产成人无码午夜视频在线观看,国产日韩综合一区二区性色av,亚洲熟伦熟女新五十路熟妇,成人极品影院

The company has eleven sets of spiral welded steel pipe production unit with international modern levels and a set of production line of modern 3-layer PE Anti-corrosion coatings. The outer diameter(OD) of spiral welded pipe from Φ219mm to Φ3600mm, the wall thickness of spiral welded pipe from 6mm to 25mm, steel grade from A25-X80.

Liaoning Province Observe Contracts and Keep Promises enterprises	Liaoning Branded Products Certificate

	China top ten enterprises in welded pipe
The Bank AAA Grade Certificate	Famous Trademark Certificate of Liaoning Province Famous Trademark Certificate of Anshan City