Liquid Ring Vacuum Pumps, Compressors and Systems: Conventional and Hermetic DesignEbookLiquid Ring Vacuum Pumps, Compressors and Systems: Conventional and Hermetic DesignbyHelmut BannwarthRating: 0 out of 5 stars0 ratingsSave Liquid Ring Vacuum Pumps, Compressors and Systems: Conventional and Hermetic Design for later