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41. | reverse circulation sub |
| 反循环接头 |
|
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42. | capillary joint |
| 毛细接头 |
|
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| |
43. | male connection |
| 外螺纹接头 |
|
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| |
44. | steel belt lacing |
| 钢带接头 |
|
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45. | fueling connection |
| 加油接头 |
|
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46. | rudder coupling |
| 舵杆接头 |
|
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| |
47. | flush-through connection |
| 冲洗接头 |
|
|
| |
48. | oil outlet fitting |
| 放油接头 |
|
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| |
49. | external terminal |
| 外部接头 |
|
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| |
50. | telescopic lap splice |
| 套接接头 |
|
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| |