Currently the new generation “K” series products of XCMG—the 50-m three-bridge pump truck with globally longest full steel arm performs perfectly in the construction. The product successfully challenged the limits of 3-bridge base with the globally longest full steel arm and led the new height in technology among rival products. The reporter saw at the site that the construction site was extremely narrow and rugged. With a longitudinal angle between the rear landing leg and the machine body below 30°, the said product can work for ten hours in succession at a pouring speed of 60-70 cubic meters per hour, successfully finishing its debut with a perfect construction effect.