1·All visitors to the site must wear safety helmet.
到工地的所有参观者必须带上安全帽。
2·Purchased key Labor Protection Articles, such as safety Helmet, Anti-gas Aspirators must have label of safety assessment.
所采购的关键劳动防护用品如安全帽、防毒口罩等必须有安鉴字样的标签。
3·It is dangerous to go about on the construction site without a safety helmet.
不带安全帽在工地上走来走去是危险的。
4·Wearing a safety helmet, sweating is better than bleeding.
骑车请戴安全帽，流汗总比流血好。
5·This way please. Do not forget to put on your safety helmet.
请从这边走。别忘了戴好安全帽。