أ: 57.20
OD/ID xt: 19.05/15.75 × 1.65
OD1/ID1 × t1: 19.05/15.75 × 1.65
OD/ID xt: 19.05/15.75 × 1.65
OD1/ID1 × t1: 19.05/15.75 × 1.65