发明名称 Ptfe smoothing board - for asphalt road surfacer
摘要 <p>Smoothing board for asphalt surfacer sheets has a working surface of polytetrafluoroethylene, preferably containing metal or other filler and with its load-bearing capacity increased structurally in its working surface region, e.g. by cellular construction.</p>
申请公布号 DE2022542(A1) 申请公布日期 1971.12.02
申请号 DE19702022542 申请日期 1970.05.08
申请人 WIRZBERGER,HELMUT 发明人 WIRZBERGER,HELMUT
分类号 E01C19/42 主分类号 E01C19/42
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