| 1. | A surgical mask should be changed at least daily
外科口罩应最少每天更换。 |
| 2. | Surgical masks - requirements and test methods
外科手术面罩.要求和试验方法 |
| 3. | Surgical masks - requirements and test methods
外科手术面罩.要求和试验方法 |
| 4. | A surgical mask should be changed at least daily
外科口罩应最少每天更换。 |
| 5. | When wearing a surgical mask , ensure that
佩戴外科手术专用口罩，一般应注意以下事项： |
| 6. | In general , a surgical mask needs to be changed daily
一般情况下，外科口罩要每日更换。 |
| 7. | In general , a surgical mask needs to be changed daily
一般情况下，外科口罩要每日更换。 |
| 8. | 27 . what are the points to note when wearing a surgical mask
27 .佩戴外科口罩要注意甚么？ |
| 9. | A priest must wear a surgical mask while hearing confessions
司铎听告解时必须戴上外科专用口罩。 |
| 10. | Technical requirements for surgical mask
医用外科口罩技术要求 |
