发明授权
US5262453A Cushion or trackbed material for use in riding-ground 失效
用于骑地的靠垫或轨道材料

Cushion or trackbed material for use in riding-ground
摘要:
A cushion or trackbed material for use in a riding-ground is obtained by coating sand with a carboxyl-containing olefin polymer and an oxygen-containing wax.
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