commercial warranty clause
warranty
保证
保
担保
批
保单
特约
授权
质量
保证书
特约条款
保修单
理由
保证担保
保证条款
免费保修
保修期
批准
质量保证
warranty period
质量保证期
保证期
保证时期
质保期
保质期
保修期
废料处理
a letter sent as thanks for being treated well as someone’s guest
acceptance letter of credit
accepted letter of credit
advice of transfer of letter of credit
advisory letter [slope maintenance]
amend a letter of credit
application for letter of credit