When tested in the low temperature,the test specimens shall be left in the specified temperature for 3 hours ir more prior to the test.Fix a pendulum-type hammer on a testing on a testing machine,find the energy required to break a test specimen by the impact applied by a single swing of the pendulum.The hammer used here shall be of specified capacity.The test results are reported in lerms of energy absorbed per unit of specimen width,i.e.J/m[kgt’cm/cm].(Record the energy even if a specimen does not break)