请问螺柱 24mm x 150mm Stud bolt 2 nuts H = D / HG20634
请问螺柱 24mm x 150mm Stud bolt 2 nuts H = D / HG20634 24mm x 150mm Stud bolt 2 nuts H = D / HG20634 Metric ISO 262 - Nut ISO4033 H = D / 35CrMoA,GB3077 - 30CrMo,GB3077 hot dip galvanized in accordance with ASTM A153 请问双头螺柱如何表示?