| 1. | Unit 4 is this your bike
第4单元这是你的自行车吗 |
| 2. | My 4 - element form picks up where the barlow concept can go no further
我的第4单元形式拿起那里巴卢概念，可以去没有进一步。 |
| 3. | Maintenance standards for civil aircraft . unit 4 : labour safety and health . part 91 : general rules
民用航空器维修标准.第4单元：劳动安全卫生.第91部分：通则 |
| 4. | Maintenance standards for civil aircraft . unit 4 : labour safety and health . part 93 : rules for electricity utilization
民用航空器维修标准.第4单元：劳动安全卫生.第93部分：用电安全规则 |
| 5. | Maintenance standards for civil aircraft . unit 4 : labour safety and health . part 99 : regulations for management of occupational health
民用航空器维修标准.第4单元：劳动安全卫生.第99部分：职业卫生管理 |
| 6. | Maintenance standards for civil aircraft . unit 4 : labour safety and health . part 97 : safety regulating rules for lifting facility
民用航空器维修标准.第4单元：劳动安全卫生.第97部分：起重设备安全管理规则 |
| 7. | Maintenance standards for civil aircraft . unit 4 : labour safety and health . part 92 : safety regulating rules for ground equipment
民用航空器维修标准.第4单元：劳动安全卫生.第92部分：地面设备安全管理规则 |
| 8. | Maintenance standards for civil aircraft . unit 4 : labour safety and health . part 98 : safety regulating rules for welding and cutting
民用航空器维修标准.第4单元：劳动安全卫生.第98部分：焊接与切割安全管理规则 |
| 9. | Maintenance standards for civil aircraft . unit 4 : labour safety and health . part 101 : rules for management of labour protection articles
民用航空器维修标准.第4单元：劳动安全卫生.第101部分：劳动防护用品管理规则 |
| 10. | Maintenance standards for civil aircraft . unit 4 : labour safety and health . part 96 : safety tegulating rules for gas cylinder on the ground
民用航空器维修标准.第4单元：劳动安全卫生.第96部分：地面气瓶安全管理规则 |
