| 1. | The magnet ' s hollow core holds the targets
磁铁的中空核心会追踪目标。 |
| 2. | Precast concrete products - hollow core slabs
预制混凝土产品.空心板 |
| 3. | Precast concrete products - hollow core slabs
预制混凝土产品.空芯板 |
| 4. | Prestressed concrete hollow cored panels
预应力混凝土空心装配板 |
| 5. | Precast concrete products - hollow core slabs ; german version en 1168 : 2005
预制混凝土产品.空芯板 |
| 6. | Test method of concrete compressive strength for extrution hollow cored slab
挤压成型空心板用混凝土抗压强度.试验方法 |
| 7. | Fire resistance tests for service installations - raised access and hollow core floors
辅助设施的防火试验.架高通道和空心地板 |
| 8. | Fire resistance tests for service installations - part 6 : raised access and hollow core floors
辅助设施的防火试验.第6部分:架空通道和空心楼板 |
| 9. | Fire resistance tests for service installations - part 6 : raised access and hollow core floors ; german version en 1366 - 6 : 2004
辅助设施的防火试验.第6部分:架空通道和空心楼板 |
