The hardness, surface quality and size precision of gas valves treated by above double heating...

用该炉进行气门的离子渗氮，其硬度、表面质量和尺寸精度均能达到产品的技术要求。

youdao

The silicon carbide whiskers synthesized by double heating, using carbon black and SiO 2 powders as raw materials, were studied.

以炭黑和二氧化硅微粉为原料，对双重加热法合成碳化硅晶须进行了研究。

youdao

Power guide roller for convenient plate alignment, Pneumatic elevation for rubber pressure roller, the drying system employs double heating chambers(electric heater) for superior efficiency.

电动导轮对版设计、橡胶压轮升降气动式、干燥系统采用双层热风烘箱（电热式）。

youdao

The cottages are equipped with phones, high-definition TV, central heating and double-paned windows to keep out raging storms.

FORBES: Bed & Beacon

For a major overhaul, consider installing photovoltaic cells on your roof, hydronic radiant heating in your floors, double-glazed panes in your windows and low-flow toilets in your bathroom.

FORBES: Julia Cosgrove

As well as adding double glazing and insulation, he has turned the heating right down.

BBC: How warm is your home?