Trouble caused by pitch deposition in newsprint production of Guangzhou Paper Mill is described. Chemicalcontrolmethod and process control method for controlling pitch deposition are discussed.
IPM is an effective pest controlmethod that uses information on the life cycle of the pest and incorporates nonchemical and chemical methods.
这种方法是一种有效的综合运用非化学和化学方法的方法，并充分利用害虫生长周期的一种方法。
3
Method to monitor sterilization effect comprehensively, adopt biological indicator and chemical indicator to control different parameter and mechanical status during the sterilization.