To act as key user of operation for plant upgrades, commissioning, water trials etc.

在工厂升级，试车，水试等工作中起关键作用。

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Taking a large-scale bus frame as the research object, the thesis carried out static and dynamic analysis under typical operation situation based on the finite element theory and engineering trials.

本文以一款大型客车骨架为研究对象，结合有限元理论和工程试验，进行了典型工况下的静态、动态分析。

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In the summer the RMT claimed London Underground (LU) planned to move the entire Jubilee line to driverless operation within three years, with trials starting later this year, with other lines to follow.

BBC: Strike ballot over tests for driverless Tube trains