① Longth of tube:  ≥1250mm( from bottom to tundish);   wall thickness:≥0.4mm

② vol. of outing of tundish: ≥10cm;   average wall thickness:≥0.7mm

③  Rejection rate of ofinhaler: ≥90%( against  particle which≥0.5micron in air)

④Rejection rate of liquor filter: ≥80%( against  particle which≥20micron in air)

⑤ Weight of dropping liquid: 20drops＝1mL±0.1mL（1g±0.1g）

⑥flow velocity of transfusion: in 10min output NaCL( density9g/L)≤1000mL

⑦ Regulating valve flow regulator: ≥30mm