... portable asphalt plant 移动式沥青混合设备 portable beam 活动梁 portable breakout equipment 轻便式拆装设备 ...
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portable roller beam 可拆卸滚动横梁
Portable Multi-Beam Echo Sounder 便携式多波束测深仪
portable hatchway beam 活动舱口梁
portable wed plate beam 活动桁板梁
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A portable laser system, continually working for very long period, is the key part in realization of an optically pumped cesium beam frequency standard.
长期连续工作的袖珍激光系统是实现实用的光抽运铯束频标的关键。
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His track record, of course, has been mixed: In 2002, for instance, Gates premiered the Mira, the portable touch screen, which never launched, and SPOT, an ambitious plan to beam weather and stock quotes to wristwatches.
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