ORQN(A) Freezing Point Tester I. Product i ntroduction The instrument is integrated, with one slot and two holes. It consists of a refrigeration cycle system consisting of an imported fully enclosed compressor, a temperature control system and an automatic 60 second timing system. The cold tank adopts the patented technology of alcohol-free compressor cold trap, which combines the advantages of compressor refrigeration and semiconductor, and overcomes the disadvantages of
