Zhengzhou Greatwall Scientific Industrial & Trade Co.,Ltd. is a comprehensive company merging research, development, production and operation into a single whole. Since the establishment in April, 1988,the company has developed teaching instruments and equipment including water circulating type multipurpose ...
read moreproduct can form film under constant temperature heating and negative pressure conditions. Owning to its efficient ...
read morecooling circulating-water machine provides constant-current constant-pressure circulating cooling water flow to meet ...
read morelow-temperature (constant-temperature) stirring reaction bath is a new experiment,it may make low-temperature reaction ...
read moreAdopting large-volume,big diameter evaporating botttle,these series of large,new rotary evaporators have large evaporating ...
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