Authors expound plastic formwork technology for open waffle slab of clean room in IC workshop systematically,and discuss the key problems in construction and controlling method.

Meanwhile, according to some key construction techniques, plastic formwork technique and bottom girder treatment skill detailed introduction is made.

Application of bolts with plastic expansion shell;

There are three technical issues to be solved for the design of the GNFC20 nickel cadmium prismatic sealed alkaline battery with plastic case that are to reduce the internal resistance,to decrease the internal pressure during charge and to make the gas vent pressure of safety valve reasonable and steady.