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| 41. | plastic trough theory |
| 塑性槽地理论 |
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| 42. | trough cross-bedding |
| 槽形交错层 |
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| 43. | trough of flame |
| 火焰空穴|火焰槽 |
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| 44. | trough concrete mixer |
| 槽形混凝土搅拌机 |
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| 45. | trough-belt conveyer |
| 槽带式输送机 |
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| 46. | trough water-closet |
| 槽式水厕 |
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| 47. | rheolaveur rheo trough |
| 里欧式洗煤槽 |
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| 48. | trough cross-stratification |
| 槽状交错层理 |
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| 49. | trough chain conveyor |
| 槽形链板输送机 |
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| 50. | continuous trough conveyer |
| 连续槽型运输机 |
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