泵浦倒空是限制激光等离子体拍频加速器概念成为现实的严重问题。
The pump depletion is a severe problem which hinders the laser-plasma beat-wave accelerator concept from being practical.
阿尔卡特真空技术的产品包括真空泵，检漏仪，真空计，等离子传感器，阀门，法兰及其配件。
The Alcatel vacuum Technology product-range includes vacuum pumps, leak detectors, vacuum gauges, plasma sensors, valves, flanges and fitting.
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