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水管工來了。用塑料管更換舊銅管 - 我質疑。 他使用本生燈,氣體燃燒5分鍾,這個塑料管顯示透明 - 甚至不彎曲!他說科技新材料比銅管好 - 我半信半疑, 眼見為實 ?!
Plumber came. Replace copper pipe with plastic tube. He used bursen burner burning 5 min, the plastic tube was transparent - not even bending! What? New is better?