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| 51. | pipe straightener |
| 管子矫直机 |
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| 52. | converting pipe |
| 变形管 |
|
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| 53. | connecting pipe |
| 连接管,管接头 |
|
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| 54. | serpentine pipe |
| 蛇形管 |
|
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| | |
| 55. | pipe elimination |
| 除缩孔法 |
|
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| 56. | pipe resistance |
| 管子阻力 |
|
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| 57. | pipe hydraulics |
| 管流水力学 |
|
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| 58. | unthreaded pipe |
| 无螺纹的管子 |
|
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| 59. | pipe measurement |
| 管子测量 |
|
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| | |
| 60. | antipriming pipe |
| 防止汽水共腾管|多孔管 |
|
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