This type of letter is an outgoing letter and maybe called a "first Enquiry".

这种类型的信函或许可被称为“ 第一次询价?。

youdao

Trading emissions for forestry credits is now in their early stages in China. Just a few weeks after the launch of the program the first overseas enquiry arrived.

林业信贷额的交易排放现在在中国处于早期阶段。在项目开始不到几个星期之后，就收到第一个海外咨询。

youdao

My personal experience it only took 45mins after my initial posting to get the first sales enquiry call.

根据我的个人经验，由我最初贴出资料到接到第一个销售来电查询只是用了45分钟。

youdao

She does a good job on Whitewater, the Arkansas real-estate scandal which prompted the independent counsel's enquiry in the first place.

ECONOMIST: The Clinton scandal is getting the books it deserves

He returned to NASA twice to serve on boards of enquiry, the first into the near-disaster of Apollo 13, the second into the disintegration of the space shuttle Challenger in 1986.

ECONOMIST: Neil Armstrong