水管工来了。用塑料管更换旧铜管 - 我质疑。 他使用本生灯，气体燃烧5分钟，这个塑料管显示透明 - 甚至不弯曲！他说科技新材料比铜管好 - 我半信半疑, 眼见为实 ?!
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?
水管工来了。用塑料管更换旧铜管 - 我质疑。 他使用本生灯，气体燃烧5分钟，这个塑料管显示透明 - 甚至不弯曲！他说科技新材料比铜管好 - 我半信半疑, 眼见为实 ?!
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?
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