英语翻译Access to Lines of CreditThe Bidder shall provide with i

英语翻译
Access to Lines of Credit
The Bidder shall provide with its Tender evidence of access to line of
credit equivalent to the following amounts:
This shall be in form of Letters of Comfort from the Bidders’ Bankers.
Additionally the Bidders must give authority to the Purchaser to contact
their bankers.
请问大家这里讲的是不是投标保证金啊？