air hose connection
/ˈeə ˈtʃeɪmbə/
n
English · air hose connection中文 · 进气接头Español · conexión para la manguera de aireFrançais · raccord d’arrivée d’air
意味：Threaded part receiving a flexible tube; it is connected to a compressor that allows the compressed air into the body of the gun.