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| 31. | thickness of the shell |
| 壳厚度 |
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| 32. | cytotrophoblastic shell |
| 细胞滋养层壳 |
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| 33. | A univalve mollusk or shell. |
| 单壳软体动物或壳 |
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| 34. | double shell form |
| 双壳船型 |
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| 35. | crawfish in shell |
| 带壳小龙虾,带壳淡水螯虾 |
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| 36. | fresh-water turtle shell |
| 甲鱼壳 |
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| 37. | orchestra shell |
| 壳形演奏台;演奏席壳盖;音响反射板 |
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| 38. | gas filter shell |
| 煤气过滤器壳 |
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| 39. | shell of spark plug |
| 火花塞壳 |
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| 40. | inner shell excitation |
| 内壳电离 |
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