德国普发Pfeiffer DUO系列双级旋片真空泵：

DUO2.5（Pfeiffer DUO2.5用于色谱仪前级泵；用于安捷伦质谱仪；应用于烟草局行业）

Duo 1.6

Duo 1.6M

Duo 3(旧款型号DUO 2.5)

Duo 3M

DUO 3 DC

Duo 5 M

Duo 6

Duo 6M

Duo 10 M

Duo 11

Duo 11M

Duo 20 M

Duo 35

Duo 35M

Duo 65

Duo 65M

Duo 125（旧款型号DUO 120）

Duo 125M

Duo 255(旧款型号DUO 250)

Duo 255M