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51. | rotating connection |
| 回转接头 |
|
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52. | rudder coupling |
| 舵杆接头 |
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| |
53. | reverse circulation sub |
| 反循环接头 |
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54. | cylinder jointing |
| 汽缸接头 |
|
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55. | oil outlet fitting |
| 放油接头 |
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56. | carburetor adapter |
| 化油器接头 |
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57. | steel belt lacing |
| 钢带接头 |
|
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| |
58. | regulator connection |
| 调压器接头 |
|
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59. | telescopic lap splice |
| 套接接头 |
|
|
| |
60. | vacuum connection |
| 真空设备接头 |
|
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