High-density polyethylene and low-density polyethylene were the second and third place polymers.

高密度聚乙烯和低密度聚乙烯是在名单中排在二位和三位的高聚物。

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Low density polyethylene makes a nice substitute for PVC. It has a simple makeup and doesn't require additives to make it soft and pliable.

低密度的聚乙烯是PVC很好的替代品，它的生产过程相对简单，也不需要添加化学物质增加柔软性。

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Jacket: Black low mid or high density polyethylene.

护套：黑色低密度或中密度或高密度聚乙烯。

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Makers of plastic bottles for water and milk, for example, have faced a shortage of high-density polyethylene since the hurricanes.

FORBES: Magazine Article

The first trial run demonstrated that 1 km of high-density polyethylene pipe could be laid down over mountainous terrain and in windy conditions in just nine minutes.

FORBES: Startup Aims To Install Pipelines With Helicopters...Seriously!

These days you should be getting high-density polyethylene pipes.

FORBES: Magazine Article