This invention relates to erosion resistant foundry binder systems, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising an epoxy resin; a multifunctonal acrylate; a phenolic resin that is soluble in and ; and an effective amount of a free radical initiator. As seen from the suction chamber side, there are formed, as introduce passages, grooves extending from suction openings of the front side block of the compressor section to the peripheral surface in the lowermost portion of the front side block. The film may be adhered to the inside face of the bag or may form a separate membrane that is placed over a layup being molded in the bag. An actuator can be translated in a horizontal direction, the horizontal translation causing the latching member to translate in the vertical direction. In one example, the method includes receiving a query page, extracting features from the query page, re-weighting the query page, evaluating the query page in light of each ad in order to score each ad and pick substantially best ad matches of the indexed ads, and returning the substantially best ad matches to the consumer computer.