... from super steel QD5/10/15 ton ,mechanical jack ,mechanical track jack ,rack-type jack ,rack jackgood quality easy to operate easy ... 3is made from super steel Structure diagram :1, Top2, up rod3, up spring4, mid rod 5, mid spring6, mid rod7, housing8 ... the axle11, down pallet12, cranking bar13, axle14, lifting spanner15, up & down spannerQD10T RACK-TYPE JACKApplication :This machine is suitable in ...