按照生產(chǎn)廠家的使用說明，經(jīng)常更換過濾筒。Change the filter cartridge as often as instructed by the manufacturer.絕大多數(shù)鍋爐有15至20年的使用期限。Most boilers have a lifespan of 15 to 20 years.所有產(chǎn)品均標(biāo)有詳盡的使用說明。All the products are labelled with comprehensive...