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| 71. | rigid-shank applicator |
| 刚性施肥开沟器 |
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| 72. | rigid driven gear |
| 刚性从动齿轮 |
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| 73. | rigid piston valve |
| 固定式汽阀 |
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| 74. | plane rigid frame |
| 平面刚架 |
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| | |
| 75. | rigid polyvinyl chloride |
| 硬聚氯乙烯 |
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| 76. | rigid submarine repeater |
| 固定式海缆增音机 |
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| | |
| 77. | rigid protection measure |
| 刚性保护措施 |
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| | |
| 78. | homogeneous rigid board |
| 均匀硬板 |
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| | |
| 79. | rigid steel rule |
| 硬钢尺 |
|
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| | |
| 80. | rigid body pendulum |
| 刚体摆 |
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