Gantry crane track is installed in the concrete structure, how to adjust the level?
reduce the uneven spear increase pad Iron use, to be solidified to complete the final use of horn leveling on the OK, this is the most simple
in the buried spear when the basic leveling, but also in the solidification of the time to adjust to find a flat,
n the grouting when the first to be buried inside the embedded parts, is commonly known as the spear,
