But I'm sure you remember that from episode 62, " White Flags: Who's Wavin' 'Em and Why"
但想必你们肯定还记得这些，因为62集" 白旗：谁举白旗及缘由" 都讲过。
英语百科
Wavin
Wavin N.V. is a Dutch manufacturer of plastic pipes, mainly for drainage and water supply purposes. The company was officially founded on 5 August 1955, its name deriving from WAter and VINyl chloride. The company provides plastic pipe systems and products for tap water, surface heating and cooling, soil and waste, rain water, distribution of drinking water and gas and telecom applications.