... .5 FeaturesBT-980 is a combination type of the newest automatic tyre changer ,has the function for tyre change, tyre ... .2.Post has the function of back retroversion pneumatic control automatic positioning , so it works more agile.3.Pneumatic tyre arm ... the grail mechanical service life effectively.6.Has quickly air inflator system, and collocate air storage, turntable slide block cover seat ...