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41. | preheating of the mixture |
| 混合剂预热 |
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42. | stone conditioning |
| 预热磨石 |
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43. | warm up a connection |
| 敲击螺纹接头使之松动 |
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44. | solar preheat system |
| 太阳能预热系统 |
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45. | Warm-up (exhibition); preview |
| 预展 |
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46. | heater warm-up time |
| 热丝升温时间 |
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47. | oil warm-up torch |
| 重油点火嘴 |
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48. | gold preheating loop |
| 预热金环管 |
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49. | warm up the house. |
| 使房子暖起来 |
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50. | preheat starting switch |
| 预热起动开关 |
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