一级特黄毛片国产毛片,视频一区二区不卡,伊人狠狠干,中国国产高清一级毛片

This kind of product is comprised of high-damping rubber and plate connected with bolts.It is used under 8 degrees of seismic intensity in highways and municipal bridges.Products comply with:JT/T 842-2012 High damping seismic isolation rubber bearings for highway bridges and GB 20688.2-2006 Elastomeric seismic-protection isolators for bridges.