Figure 2
Structure and size of drip irrigation belts for tensile strength measurement: L3 is the total length, 115 mm; L2 is the initial distance between two clamps, 80 mm; L1 size is 33 mm; L0 is the distance between two markings, 25 mm; R is the large arc radius, 25 mm; r is the small arc radius, 14 mm; b is the width of the sample at that position, 6 mm; b1 is the width of the sample end, 25 mm; d is the thickness of the sample, 0.2 mm.
