One of its manhole tests is simple: A candle is placed inside, and if oxygen levels are too low, the flame goes out.
其中一项进入检查井前的试验是很简单的，把一支蜡烛放进井口，如果蜡烛熄灭，说明井中氧气不足。
If there are toxc gases, the candle explodes.
如果蜡烛引起爆炸，说明里面有有毒气体
Assuming the situation is safe, workers must be fitted with harnesses before descending into manholes, which are as deep as 20 feet.
确定情况安全，工人须披挂好各种装具再下去，井下有20英尺深
Kale, who said he doesn't know his age, has been a manual scavenger since he was a youngster. He said he's never seen tests carried out or even a first-aid kit at a work site.
克勒，他说他不知道自己几岁了，但是从小就干人工清淤，他说他从来没见过做什么试验，也没有在工作现场见过哪怕一个急救箱
Standing on a narrow street lined by covered gutters, wearing a tank top and a dirty handkerchief around his right palm, Kale said that if he asks for gloves, his boss ridicules him.
站在有一排阴沟的窄巷，他穿着一件无袖上衣右臂裹着一条脏兮兮的手帕，克勒说，如果求人给双手套，老板一定会奚落自己的
Standing on a narrow street lined by covered gutters, wearing a tank top and a dirty handkerchief around his right palm, Kale said that if he asks for gloves, his boss ridicules him.
站在有一排阴沟的窄巷，他穿着一件无袖上衣右臂裹着一条脏兮兮的手帕，克勒说，如果求人给双手套，老板一定会奚落自己的
India’s sewer system
印度下水道
