by-product productionの例文
- The operation of the speaker requires a continuous supply of helium gas ; with the attendant problems of handling heavy cylinders , and the by - product production of ozone can reach hazardous levels in closed rooms
- The town has rich - endowed resources of farming by - product production and a lot of farm industrialized processing enterprises . in the town there arc 3 rice processing enterprises , 3 feedstuff processing enterprises and 4 aquatic produce processing enterprises
