huàn dēngpào huàn diànchí huàn lǜxīn kànqǐlái jiǎndān dàn yě yǒu guīgé

换灯泡、换电池、换滤芯看起来简单，但也有规格。

Replacing lightbulbs, batteries, and filter cartridges seems simple, but they also have specifications