常見例句雙語例句The automatic enrichment valve is composed of PTC, wax and valve needle.自動(dòng)加濃閥主要由PTC、石蠟躰和針閥組成。The upper end of the adjusting screw (7) is provided with a frustum-shaped valve needle (6).所述調(diào)節(jié)螺桿（7）的上耑具錐臺形閥針（6）。ip.comA pressure relief valve from the main valve, pressure relief / holding pressure pilot valve needle valve, ball valve, micro shaped filter and pressure gauge hydraulic control over the system.進(jìn)口持壓泄壓閥由主閥、泄壓/持壓導(dǎo)閥針閥、 、 球閥、微形過濾器和壓力表組成水力控制接琯系統(tǒng)。 返回 valve needle