BTT(Beijing Tiandijingyi Technology CO. LTD) is a new high-tech enterprise registered in ZhongGuanCun Science and Technology Park. Our company has an excellent designer team who firstly apply the technology of cascade refrigeration system to ultra-low temperature refrigerators in China. Our major is for designing, developing and producing low-temperature Chamber such as -86c freezers, freezing dryers, ultra-low temperature liquid dipper and Chiller&＃12290;Our company is the ever-first producer which make the real -86c freezers with the technology of cascade refrigeration system in China! Our products are welcomed not only used in China but also exported to many other countries like UK and Singapore etc. Our expert can design and install customized cryogenic Equipment everywhere in the world. We are also provide the professional service for any brands such as SANYO&＃12289;REVCO&＃12289;FORMA&＃12289;HETO&＃12289;NUAIRE and HARRIS.