... 1.CE&ISO 2.step-down 3.delivery:3days transformer oil dielectric strength tester factory Shenzhen Goter Power Technology Co., Ltd. is the ... year quality warranty 4.Certificate: ISO9001, SGS, CE transformer oil dielectric strength tester factory * ST step-down transformer can be used in 110 ... Rice Cooker, Fan, Fax Machine, Air Machine, Computer. transformer oil dielectric strength tester factory