Running Tracks can be sub-divided into the following four systems: 　   Champward CW-361 System   Full Pour (Polyurethane)   Poured-in-site system contains a base layer of about 10mm thickness   paved by mixing two components of PU coatings.  After curing, a granular   textured finish of 3 - 5mm thickness is installed.  This system is strong,    durable, and conforms to IAAF's "Performance Specifications for Synthetic   Surfaced Athletic Tracks".  When well-installed and properly maintained, a   life span of 8 to 10 years can be expected. 　 　   Champward CW-362 System   Full Pour (Rubber-Chip Filled)   Poured-in-site system.  A base layer of about 10mm thickness is paved   by adding chopped rubber crumbs in 25 wt-% into well-mixed PU coatings.   After curing, a granular textured finish of 3 - 5mm thickness is installed.    This system conforms to IAAF's "Performance Specifications for Synthetic   Surfaced Athletic Tracks".  When well-installed and properly maintained, a   life span of 8 to 10 years can be expected. 　   Champward CW-363 System   Sandwich   The system comprises a layer of PU binder-bound rubber crumb spread   by paving machine, after curing, sealing the porous rubber mat and then   installing a granular textured finish.  The system has the same appearance   as Full Pour Systems but much more economic in cost.  When well-   installed and properly maintained, a life span of 5 to 6 years can be      expected. 　 　   Champward CW-364 System   Structural Spray   The system use one-component moisture-curing PU binder to mix with   rubber crumb and spread by paving machine with a  thickness of   10 - 13mm.  After curing, two coats of colored finish coating containing   a fine rubber aggregate are applied.  The System is porous and   substantially cost saving although less durable in use.   When well-installed   and properly maintained, the product life may maintain about for 5 years .