检查每一批已经配制好的培养基和每一批用脱水培养基或配料制备的培养基1 。
Test each lot of ready-prepared medium and each batch of medium prepared either from dehydrated medium or from ingredients 1 .
本发明还提供了上述 铁氧体磁粉的制备方法，其包括以下步骤：配料、混料、预烧、粗破碎、 细磨、烘干、退火、解碎。
The invention also provides the preparation method of the ferromagnetic oxide powder, comprising the steps of dosing, mixing, preburning, crude crushing, fine grinding, drying, annealing and smashing.
以烷基烷氧基硅烷为活性配料，制备出了性能优良的有机硅防水剂，并详细分析了影响产品的各种因素。
Performance Oriented silicone water repellent agent was prepared with alkyl alkoxy silane as active ingredient. Detailed analysis of various factors affecting products was made.
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