Roofers also ranked poorly because of their hazardous working conditions.
屋顶工排名较低的另一个原因是他们危险的工作环境。
Trade certification for residential steep roofers is available, but voluntary, in British Columbia.
在不列颠哥伦比亚省，住宅陡峭屋顶工行业认证是可用的，但是自愿的。
Roofers, landscape gardeners and solar-panelinstallers use the virtual maps to scout for potential customers.
盖屋顶的人、庭园美化师和安装太阳能板的人使用虚拟地图搜索潜在的客户。
Roofers also ranked poorly because of their hazardous working conditions. "You obviously can't be afraid of heights, " says Mr.
屋顶工排名较低的另一个原因是他们危险的工作环境。
Jobs that plummeted to the bottom of the happiness chart along with the roofers included garage and service station attendants and molding and casting machine operators.
同屋顶工一样是在快乐程度名单上垫底的职业包括：垃圾和服务站工作人员，制模和铸造机器操作员。
Jobs that plummeted to the bottom of the happiness chart along with the roofers included garage and service station attendants and molding and casting machine operators.
同屋顶工一样是在快乐程度名单上垫底的职业包括：垃圾和服务站工作人员，制模和铸造机器操作员。
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