From the chemical composition, trace element, inoculation and thermal exchange of metal mold casting, the principle of chill formation and the effective methods for preventing chill were studied.

文章从铸铁的化学成分、微量元素、孕育处理及金属型的热交换方面叙述了产生白口的原理及防白口的有效方法。

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Trace cobalt in running water from Guangzhou Running Water Factory, ZhongshanUniversity Running Water Factory and Pearl River water were determined by laser thermal lenstechnicality.

本文应用激光热透镜技术测定了广州自来水厂和中山大学自来水厂的自来水及珠江水中的微量钴。

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Tyco Thermal Controls can provide a complete system from electrical transformer and heat-trace panel to power connections, heating cable, end terminations, glass tape and warning labels.

泰科热控提供一整套完备的系统，从配电变压器、电伴热控制柜到接线盒、伴热线、尾端、玻璃胶带和警示标签。

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Two police helicopters, one with thermal imaging equipment, were also used to try to detect any trace of an animal.

BBC: 'Essex lion was my pet cat Teddy Bear' - owner

Yet at hot springs and thermal spas where radon typically is found in the air or water along with carbon dioxide, sulphur gases and trace elements of other minerals, health-seekers sing its praises.

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