| 1. | The snake 's tongue shot out .
蛇飞快地吐出芯子。 |
| 2. | If a coil has no metal core it has an air core .
如果线圈没有金属芯子，它就有一个空气芯子。 |
| 3. | Numerical calculations have been made for wave-guides with a core of rectangular cross-section embedded in a uniform surround of lower refractive index .
对于掩埋在较低折射率的均匀介质中的距形截面芯子的波导曾作过数值计算。 |
| 4. | Significant deviation occurs only when the beam is not slender or for sandwich constructions with very soft core material in which shear deflection becomes significant .
只有当桥不是很细长，或者是用很软的材料做芯子构成夹心结构的情况下，才会产生明显的偏差，因为这两种情况下剪切挠度都很大。 |
| 5. | Psi 327 . pick up test mandril and place in bop
吊起试压防喷器芯子并装入防喷器组 |
| 6. | Test method for density of sandwich construction or cores
夹层结构或芯子密度试验方法 |
| 7. | Pick up test mandril and place in bop
吊起试压防喷器芯子并装入防喷器组 |
| 8. | Test method for density of nonmetal
非金属夹层结构或芯子密度试验方法 |
| 9. | Test method for shear properties of
夹层结构或芯子剪切性能试验方法 |
| 10. | Test method for water absorption of
夹层结构或芯子吸水性试验方法 |
