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| return bend | |||
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| ninety-degree elbow | |||
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| knee bend 90 degrees | |||
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度 弯头 : 15 phrases in 6 subjects |
| Drilling | 2 |
| Golf | 1 |
| Hydroelectric power stations | 1 |
| Mechanics | 1 |
| Oil / petroleum | 1 |
| Technology | 9 |
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