国产精品久久高潮呻吟声-国产一区二区三区大片-男插女青青影院-免费一级黄-jizz一区二区三区-日本成人第一区第二区电影网-第四成人-精品簧片-欧美一区二区三区久久天堂-91福利免费视频-添女人荫蒂视频

TORSIONAL SHEAR BOLT

THE FINISH:PLAIN PHOS PHINED,BLACK,Z/P,HDG,DACROMET

L(BOLT LENGTH)=CONNECTING PLATE THICKNESS+L1

L1=NUT THICKNESS+2×WASHER THICKNESS+(2-3)THRED PITCH