免费观看黄色视频网站|人妻互换20综合|国产欧美日韩亚洲黄色一级|久久久久久久久国产精品一区|国产又黄又刺激又免费又舒服-热影AV

MFL-104 sucker rod magnetic flux leakage testing machine
Product introduction
Cracks, eccentric wear and corrosion pits of Φ16mm~46mm sucker rods were detected. DC demagnetization and AC demagnetization were used to automatically detect, alarm, mark and alarm.

欄目 產品 電話