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through Retarder which is used to further enhance commercial vehicles' braking
performance. This is a wear-free continuous brake, just like engine brakes. This
reduces the need for the service brake, improves active safety, and boosts
commercial vehicles' efficiency. The drive train of a commercial vehicle has this
device added. Retarder is available in some ranges like Gypsum
Retarder-Goodpoly GR90, Cement Retarder-Sodium Gluconate, Gypsum
Retarder-Goodpoly GR40, and Gypsum Retarder-Goodpoly GR20. It lengthens the
time that concrete takes to set. It makes concrete easier to work with. The
concrete now has a much better look. This device is very easy to install as
well as simple to handle.