A.750.0MPa
B.588.8MPa
C.750MPa
D.589MPa

A.392.5MPa
B.393MPa
C.500.0MPa
D.500MPa

A.55mm
B.56.42mm
C.63.68mm
D.65mm

A.12.74mm²
B.50mm²
C.100mm²
D.127.4mm²

A.4mm
B.6mm
C.10mm
D.15mm

A.2mm
B.4mm
C.10mm
D.15mm

A.20mm
B.25mm
C.36mm
D.50mm

A.几何形心
B.平行于其中一个面且边距≤2mm
C.平行于其中一个面且中心距该面12.5mm
D.平行于其中一个面且中心距该面1/4d

A.20mm
B.25mm
C.36mm
D.50mm

A.腰部（腹板）中心点位置
B.腰部（腹板）三分点位置
C.腰部（腹板）四分点位置
D.腰部（腹板）与腿部结合处

A.距腿部与腹板结合点2/3处
B.距腿部与腹板结合点1/2处
C.距腿部与腹板结合点1/3处
D.距腿部与腹板结合点1/4处