1.mobile yard ramps,dock lever.
2.a kind of special auxiliaries quipment for goods loading/unloading.

    Mobile Yard Ramps is a kind of special auxiliaries quipment for goods loading/unloading.    It is usually appeared on situation where loading/unloading location being variable,    If a forklift truck need enter into the conttainer from ground,the mobile yard ramp will be the best choice.