1. PTFE/Pb Composition, 0.***0.**3mm, anti-abrasion material, which
will form a lubricating film during operation.
2. Bronze powder layer, 0.**0.*5mm, which further strengthen the
combination of the steel plate and PTFE layer and transfer the heat
more quickly.
3. Low carbon steel, bear high load transfer heat.
4. Copper/Tin plating layer, anti-corrosion.
