FRP/F4 標準番号
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題名の通り、FRP/F4パイプおよび継手の規格番号、仕様、ならびに製造メーカーをお願いします。
HGT 21579-1995 ポリプロピレン－ガラス繊維強化プラスチック（PP-FRP）複合管及び管継手 HG 20520-1992 ガラス繊維強化プラスチック ポリ塩化ビニル（FRP PVC）複合管
ポリテトラフルオロエチレンとポリプロピレン、ポリ塩化ビニルには違いがあります。
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