High-density polyethylene(HDPE) double-wall corrugated pipe is a new type of pipe with excellent performance.

高密度聚乙烯（HDPE）双壁波纹管是一种新型管材，具有优良的管道性能。

Double-wall corrugated pipe will be more widely used in the departments of city planning, water conservancy and post and telecommunications, etc.

双壁波纹管将更广泛地应用于城市规划部门、水利、邮电等，由于其优越性和生命力。

FRYS series heat-shrinkable sleeve products are designed for connection and sealing of ports of double-wall corrugated pipe for water discharge and supply of municipal engineering.

热缩系列产品，是为市政工程排水、给水用双壁波纹管端口连接密封而设计的。

This is a large on-going double wall pipe project.

这是一个很大的正在进行的双重管线项目。

Double Wall Insulation keeps liquid at desired temperature longer;

双层杯子墙面使得饮品保温更持久。

This is a large on - going double wall pipe project.

这是一个很大的正在进行的双重管线项目.

Manufactured from heavy gauge steel with double wall construction side panels and welded joints for added rigidity.

从繁重的钢制造双建筑墙结构焊接接头侧板，以增加刚性。

The flow and the temperature in the three-stream mixing flow of the lobed nozzle mixer-ejector with double-wall diffuser are numerically investigated.

对双层壁扩压器与波瓣喷管组合的三股气流的引射混合进行了流场温度场的数值计算。