H42W立式止回閥 H14W螺紋止（zhǐ）回閥 HH44X緩閉止回閥 HH47X液壓緩衝止回（huí）閥 H61Y鍛鋼止回閥 HC44X橡膠瓣止回閥 HC42X消聲止回閥 HH49X緩閉式止回（huí）閥 HH44X微阻緩閉（bì）止回閥 HD741X液（yè）控止回閥 BH44H/W 夾套保（bǎo）溫止回閥 HC42T靜音止回閥
