The utility model relates to a magnetic absorption device, in particular to a shell of a magneticrod.
本实用新型涉及一种磁力吸附装置，尤其涉及一种磁力棒的外壳。
2
The method includes: detecting magnetic induction of the magnet via the sensor to judge relative position of the magneticrod and the measuring rod;
所述方法包括：通过 所述传感器检测所述磁铁的磁感应强度，判断出所述磁力杆和所述测量杆的相对位置；
3
A shell of a magneticrod is disclosed, which wraps a permanent magnet rod, and the outer surface of the shell is provided with a plurality of concave grooves.