I think this will make it much clearer:
While arranging the gear box of PRO4 constitute on front and back, from before with battery constitution, holding down trend from in the motor and rear, it was impressive to become the secure making. Presently it seemed that uses those of BJ4 provisionally concerning the underside. Because both gap running the whole distance characteristic and cornering efficiency it seems that is high level, selling this way, it is appealing rank, but concerning sale concerning details still it was undecided thing.
hahaha
