真空管路介紹：
應用于汽車制動系統，連接發動機進氣系統與真空助力器，通過單向閥的開啟和關閉，將來自于進氣系統的負壓傳遞至真空助力器，提高制動力，同時對發動機各工況負壓調節。
Vacuum hose：
It is applied in automotive brake system，connects to engine's air intake system and vacuum power steering, via check valve's opening and close to transfer the negative pressure from intake system to vacuum power steering in order to enhance the brake force and regulate the negative pressure to the engine.
