联署

lián shǔ zhèng shí

联署证实

witness a signature

wǒ men liǎng jiā gōng sī lián shǔ le yī fèn jīn nián de hé zuò yì xiàng shū

我们两家公司联署了一份今年的合作意向书。

Our two companies jointly signed a letter of intent to cooperate for this year.