保固

保固	bǎo gù	to undertake to rectify any deficiencies in the quality of a building, product or service / warranty / guarantee
保	Bǎo	Bulgaria (abbr. for 保加利亚)
保	bǎo	to defend; to protect; to keep / to guarantee; to ensure / (old) civil administration unit in the baojia 保甲 system
固	gù	hard / strong / solid / sure / assuredly / undoubtedly / of course / indeed / admittedly