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(a) The mold for individualized silicone rubber bolus, 1 is a removable stainless steel plate that can be adjusted to the width of the bolus, 2 is a stainless steel tank with the length, width, and height of 25 × 25 × 0.3 cm, and 3 can roll the mixed materials into a bolus with a thickness of 3 mm; (b) the front of bolus; and (c) the back of bolus.
