H1---Lifting Height
H---Overall Height (Mast Lowered)
H2---Overall Height (Mast Extended)
H3---Overall Height to overhead Guard
A---Overall Length
B---Overall Width
A1---Fork Overhang
A2---Wheel Base
B1---Front Tread
B2---Rear Tread
B3---Fork Width
H4---Fork Thickness
A3---Fork Length
α---Forward Tilting Angle
β--Backward Tilting Angle