日韩av无码一区二区三区不卡,亲子乱aⅴ一区二区三区下载,久久精品国产9久久综合

暖暖免费日本高清在线,激情综合色五月丁香六月,百合AV肉片无码资源无码,免费看含羞草AV片成人网站

Home | Collection | Contact us

<

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.

Detailed content

In 2006, PetroChina Xinjiang Duzishan 10 million tons gas oil refining and million tons ethylene project.

Video

Home | About us | Product | Equipment | Honors | Splendid | Project | Network | Contact us

Copyright 2012 Liaoning Aotong Steel Pipe Co., Ltd. All Rights Reserved.
Address: No.405 Anteng Road, Qianshan District, Anshan, Liaoning, China

<u id="m6r61"></u>