国产免费无遮挡久久久精品|无码素人精品视频在线|久久五月天综合视频网站|亚洲高清无码原创视频|免费观看美女一级视频|超碰人人在线人人观看

HS-PSTT Large Range Type Tester
■Range of silicon: 0.0001～19999ohm.cm
■Range of germanium 10 e-4～10e3ohm.cm
■Hot and cold probe
■Ruby  three probe
■Both needle and digital display, assuance the right.result