Introducing the development background and structure characteristics of small freon coldstoragetraining desk, illustrating some important training items on the training desk.
介绍了小型氟利昂冷库实训台的研制背景及结构特点，列举了通过该实训台可开设的实训项目。
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The cost of completely immunizing a child is approximately $US15. This includes buying the vaccines, training vaccinators, coldstorage and transport to make sure vaccines arrive safely.