It will be safety, good in quality, and fast to extract vertical ventilating shafts by "dual men windlass bucket construction method".
就通风立眼的施工环境，选用简单的“双人绞辘轳吊桶法”施工。
The well was in the back porch, broad and deep, with a bucket, chain, and windlass.
屋后的走廊里有一口又大又深的井，配有水桶、链条和辘轳。
The windlass creaked slowly as the rope wound up, each creak bringing the bucket nearer the top.
辘轳吱吱嘎嘎地缓缓地响着，井绳被一圈圈绞起来，随着这响声，吊桶逐渐升到了井口。
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