When failures occur in optical communications systems, dangerous optical emissions can harm users and maintenance workers.

当故障发生在光通信系统中时，危险的光发射可能伤害用户和维护工作者。

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The utility model has the advantages that the roller change time is reduced and the labor intensity of maintenance workers is lessened.

本实用新型的优点在于能够减少换辊时间及减轻检修工人的劳动强度。

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The detection can be performed only by filling the hydraulic oil, and the operation can be mastered by most of the maintenance workers.

使用时按标记通入液压油即可检测，一般检修人员都容易掌握，简单方便，省工省时。

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Furloughed workers could include office staff, aircraft and ship maintenance workers, teachers and medical staff.

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Bridge operator's Forth Estuary Transport Authority (Feta) maintenance workers have installed several miles of ductwork to accommodate electrical wiring.

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Maintenance workers at Haggerston Castle Holiday Park near Berwick, discovered the shell, thought to be a German "Big Bertha" Howitzer.

BBC: NEWS | UK | England | Tyne | War artefact uncovered by workers