Magnetic line of force weighs down

The utility model relates to a magnetic line of force weighs down, including box body, rolling in the box body the reference line and connect the weight head on the reference line, the face of the testee that is used for on the box body laminating is the installation face, magnetic line of force weighs down still include fixed block and rolling in auxiliary line in the box body, the second wire hole that is equipped with first wire hole that for reference line was qualified for the next round of competitions on the box body and supplies the auxiliary line to be qualified for the next round ofcompetitions, first wire hole and second wire hole are equal apart from the distance of installation face, the auxiliary line stretches out the outer tip of box body and can dismantle with the fixed block and be connected. Connect the box body on the testee, the fixed block is arranged in subaerially, drop -down reference line with weigh down the head, treat its and after static, pull out the auxiliary line, stretch out t