他正从汽车的制动器中排气。
在第一制动回路故障时，弹簧蓄能件86可以排气，以接合驻车制动器。
In the event of a failure of the first brake circuit, the spring store part 86 can be deaerated in order to engage the parking brake.
在第一制动回路故障时，弹簧蓄能件86可以排气，以接合驻车制动器。
In the event of a failure of the first brake circuit, the spring store part 86 can be deaerated in order to engage the parking brake.
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