R600a制冷剂雪种R134a雪种R22雪种F12雪种R410aR134a环保冷媒R22环保冷媒F22家用冷媒F12环保冷媒R410a环保冷媒R134a环保制冷剂R22环保制冷剂F12环保制冷剂R410a环保制冷剂R134a环保雪种R22环保雪种)