The pulley over which this rope ran was fastened underneath the lantern in a little iron box, the key to which was kept by the lamp-lighter, and the rope itself was protected by a metal case.

绕绳子的转盘关在灯下面的一只小铁盒里，钥匙由点灯工人保管，绳子在一定的高度内有一根金属管子保护着。

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With explosion-protected ballast box or explosion-protected ceiling lamp box;

可配防爆镇流器箱或防爆吊灯盒；

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