捷克斯洛法克130天不可撤销信用证可以么？？谢谢谢谢，急死了

请问各位朋友，有个第一次合作的客户， 是捷克斯洛法克的，说是由于在他们国家以公众竞标拿下的，是学校的机床。现在要和我们130天远期信用证，说是由于他们国家的政策，学校要国家给钱，你们说能么？风险很大么？ you will see, that based on this bid we can sell more in future here because other schools are started receiving money as well and they can buy only throughout public bid purchase system we he already started procedure of l/c opening. as you may not know??from the past czech republic??- czech state - is not granting any down payment and payment term for whole delivery towards us as supplier is effected in 60 days from the date of machine commissioning what means from the date when we hand over all machines and equipment to the customer by protocol signed by representative of the buyer and representative of our company. 1/ your machines are a part of big deal with czech statr – delivery for tchools and payment term from the state is 90 days from the date when we hand over machines to them. by law there is no down payment allowed – this term is valid for all contracts with czech republic. 2/ for such case our bank will open an irrevocable l/c deffered by 120-130 days only because there is no other chance. kb a.s., prague / in czech language name is:” komer?ní banka a.s., praha”/ – member of french sg societe general group/以上是这个征行，请过的朋友给个意见，很着急，谢谢了！！！ 急死了，都是些什么客户。。。。