企业

qǐ yè company; firm; enterprise; corporation; CL:家[jia1]

证书

zhèng shū credentials; certificate

签名

qiān míng to sign (one's name with a pen etc); to autograph; signature

唯一

wéi yī only; sole

购买

gòu mǎi to purchase; to buy

联系

lián xì connection; contact; relation; to get in touch with; to integrate; to link; to touch

lián xì variant of 聯繫|联系[lian2 xi4]

电报

diàn bào telegram; cable; telegraph; CL:封[feng1],份[fen4]

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