boilermakers造句

• Pipe fitters, boilermakers, miners, electricians, firefighters, foundry workers, shipbuilders, factory workers and construction workers who use asbestos-laden material are the most vulnerable
  报道说，美国每年会有2500人到3000人患上这种肿瘤疾病，其中绝大部分是曾接触过石棉的普通工人。