入にゅう札さつ依い頼らい書しょ

• 入にゅう札さつ

  入札 means 'bid' or 'tender', while 入札依頼書 is the document requesting such bids.

• 提てい案あん依い頼らい書しょ

  提案依頼書 is a more general 'request for proposal', whereas 入札依頼書 specifically relates to bidding/tendering processes.

Compound of 入札 (bid, tender) + 依頼 (request) + 書 (document).