Huang B.J.Sun B.W.2019-06-262019-06-262003112275https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037246393&doi=10.1016%2fS0011-2275%2803%2900027-4&partnerID=40&md5=ed02562dda88b7debed163ea8265949dhttps://scholars.lib.ntu.edu.tw/handle/123456789/411437[SDGs]SDG7A pulse-tube refrigerator using variable-resistance orificejournal article10.1016/S0011-2275(03)00027-42-s2.0-0037246393