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| 21. | brake metering valve |
| 制动配油活门 |
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| 22. | hydraulic-brake operating valve |
| 液力制动操纵阀 |
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| 23. | brake application valve |
| 制动作用阀 |
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| 24. | series dual -chamber air brake valve |
| 串列式双腔气制动阀 |
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| 25. | parallel dual-chamber air brake valve |
| 并列式双腔气制动阀 |
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| 26. | dynamic brake blending valve |
| 动力制动混合阀 |
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