The control effect was 92.3% to peach mould core disease by spraying preparation of PB97 in the field.
田间小区采用PB97制剂对桃霉心病的防治效果为92 .3 % ，可有效地控制病害的发生。
In this paper, technical principle on preparation of metal mould by casting method of electroslag smelting and application prospect is described.
本文简述了用电渣熔炼浇铸法制备金属模具的工艺原理和该方法的应用前景。
The technical measures for mould unloading during the preparation of a spherical charge were described and a much better design for shaping base was put forward.
文中简要阐述了在制备球形药包过程中，为解决压装药件的退模问题所采取的技术措施，并提出了较佳的成型底座的设计方案。
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