Use:Be applicable to various examination work,
the basis flat surface of the accuracy
object-staff, used for a tool machine machine
an examination to measure basis,
check size accuracy or disruptive behavior
of spare parts, and make a precise lineation,
is also an indispensable basic tool in the
machine the manufacturing.Material and
processing:The material is a high HT200-300
of the strength iron casting, work noodles
degree of hardness for HB170-240, handle
(the artificial back fire 600 degrees-700 degrees
and natural time limited efficacy 2-3 years)
to use that product through two rtificial of
accuracy stability, bear to whet function like.
Accuracy:Press nation standard to calculate
examination rules distance to carry out,
distinguish to 0, 1, 2 and 3 four grades.