A.90s B.120s C.150s D.180s
A.70~90mm B.30~50mm C.40~60mm D.60~80mm
A、兩加荷點(diǎn)界限為準(zhǔn); B、兩加荷點(diǎn)與底面中軸線交點(diǎn)范圍為準(zhǔn); C、兩加荷點(diǎn)與頂面中軸線交點(diǎn)范圍為準(zhǔn); D、兩加荷點(diǎn)與側(cè)面中軸線交點(diǎn)范圍為準(zhǔn)。