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| 31. | hot water return line |
| 热水回流管 |
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| 32. | hot water heating system |
| 热水供热系统 |
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| 33. | hot water circulating flow |
| 热水循环流量 |
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| 34. | hot-water extraction pump |
| 热水抽吸泵 |
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| 35. | pressurized hot water system |
| 高压热水系统 |
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| 36. | deep circulating hot water |
| 深循环热水 |
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| 37. | indirect hot water supply |
| 间接热水供给 |
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| 38. | hot water stop valve |
| 热水止阀 |
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| 39. | hot-water heating equipment |
| 热水供暖设备 |
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| 40. | solar hot water system |
| 太阳热水系统 |
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