39 series air source treatment unit is in Hailong basic type, including filter, relief pressure valve, filter relief-pressure valve, oil sprayer, or their combined dyad or triplet.

• 39系列气源处理件是引进德国海隆基型，包括过滤器、减压阀、过滤减压阀、油雾器以及它们组成的二联件、三联件。