... structure 3.Bent frame, beautiful and durable Envelope Expander-Tire retreading General Specification: Booking No.810000ModelFTC ... lower than the horizontal modelWalked along to complete the envelope operation,high efficiencySatisfy human-machine engineering principle.2Can ... Foot switch, hands free.3Smooth operation, reducing the envelope damage.4Frame is bent (non-welded), beautiful and durable ...