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| 31. | The down of the eider duck, used as stuffing for quilts and pillows. |
| 羽绒绒鸭毛，用作被子和枕头的芯子 |
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| 32. | Core storage, core store |
| 磁心存储器 |
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| 33. | Siguificant deviation occurs only when the beam is not slender or for sandwich constructions with very soft core |
| 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。 |
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| 34. | core for large core chamber |
| 大心腔气门心 |
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| 35. | core barrel with rubber core container |
| 橡胶套岩心筒 |
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| 36. | core and mineral core |
| 岩心与矿心 |
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| 37. | core knock-out machine(core breaker) |
| 出芯机 |
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| 38. | Test method for density of nonmetal sandwich constructions or cores |
| GB/T1464-1987非金属夹层结构或芯子密度试验方法 |
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| 39. | core course; core curriculum; common core; Basic course; elementary course; foundation course |
| 基础课(程) |
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| 40. | Test method for shear properties of sandwich constructions or cores |
| GB/T1455-1988夹层结构或芯子剪切性能试验方法 |
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