The utility model relates to a safety protecting device for the automatic braking of automobiles, comprising a safety plate, a protective net, an automatic air valve, and a propeller.
一种汽车自动刹车安全保护装置，有安全板、保护网、自动气阀、推进器组成。
The reason why the automatic exhaust valve failed to be used for air exhaust from siphon tube was investigated.
对自动排气阀不能用于虹吸管排气的理由进行了分析。
The feasibility was discussed for the use of Venturi tube and automatic exhaust valve for expelling air from siphon tube.
探讨了虹吸管利用文氏管及自动排气阀排气的可行性。
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