To install the crane span before installation, camber, level of metal structure of main girder bending, trolley rail height difference, gauge deviation, diagonal bridge survey.

安装前要对起重机安装跨度，金属结构主梁的拱度、水平旁弯，小车轨道高低差、轨距偏差，桥架对角线等进行测量。

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The novel configuration proposal reduces and even eliminates the phenomena of fed material skip, chute scarring, discharge trolley rail corrosion, difficult discharge and so on.

该新型配置方案使原生产中存在的过滤机下料跳料， 溜槽结疤，卸料小车钢轨腐蚀，卸料困难等现象大为减少甚至消失。

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In push bench, a trolley is arranged on the guide rail in the middle of the machine case, an oil motor and a coupler are arranged in the trolley.

顶管机中，小车置于机箱中部的导轨上，油马达和联接器置于小车内。

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When the interurban rail line and trolley cutting through the neighbourhood were taken out of service in 1939 and 1941, the area went into rapid decline.

BBC: Seattle��s Fremont neighbourhood

Network Rail said all the recommendations from that investigation had been adopted, leading to a new requirement that all trolley vehicles be fitted with a braking system.

BBC: Investigators and trolley