lactone ring five membered

lactose lactation lactate lactic lact- lacta lactabel lactacidemia lactacidiase lactacidin lactacidogen lactaciduria

high-power drilling machine high-power gear reducer high-powered high-precision high-pressure high-pressure boiler-feed pump high-pressure centrifugal turbo compressor high-pressure coal hydrogenation high-pressure laminating high-pressure mercury-vapor lamp