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1: Active solar heating system 2: Bird abatement 3: Community 4: Soil 5: Weed 6: Range 7: Japan 8: Periplaneta americana 9: Lead 10: Feeder 11: Contamination 12: Process 13: Change 14: Development 15: Electricity 16: Maximum mid-expiratory flow rate 17: Function 18: Action 19: Atmosphere 20: Fishery (As of 15:14)