by-product production造句

• 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
  为了增加声压，防止副产物臭氧在室内的危害，等离子喇叭使用的时候需要连续提供氦气。
• 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
  全镇农副产品资源丰富，农业产业化加工企业众多，现有稻米加工企业3家，饲料加工企业3家，水产品加工企业4家。