top lighting
... 上层钢筋:top bars 上部照明:top lighting 上部钢筋:upper reinforcement ...
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本机在工作时,所有检视门必须全部关闭,并应在上部、下部及中部经常打开的检视门处安设低压照明设备。
In operation all inspection doors must be closed. Low voltage lighting need to be placed at upper lower and middle section inspection door.
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