流体管GB/T8163-99
12cr1movg合金管 15crmo合金管 精密管
输送流体管20# GB8163-87 57,63.5,76,83,89,95,102x3-25 108,114,127,133,140,146x4-25 152,158,168,180,194,203x5-25 219,245,273,299,325,351x6-36 377,406,426,450,480,530x8-25