Ohio state representatives approved 57 to 42 and sent to the Senate a bill that could make the state the third to legalize casino gambling. The proposal would limit the operation to the city of Lorain, hold it to a five-year pilot project, and make the venture subject to approval by voters in the city along Lake Erie. Currently, New Jersey and Nevada are the only states that have legalized casino gambling. A Senate Democratic leader predicted passage, but Gov. Richard F. Celeste refused to say what he would do if the long-debated proposal reaches his desk.