求帮忙翻译，感谢感谢朋友们

a. and ask for the payment of an amount equalling 30% of the supply value,as a penalty-a right that may be settled also by retaining the amount possibly paied in advance by the proposer up to balance the amount of the penalty--has also the right to ask for reimbursement of all contractual expenses,including.... b. in case missing or delayed payment,default interests shall accruen on account of the purchaser as from the expiry date,based on the Italian official dscount rate in force at time of payment, increased by "x" percent rate in such a way that the total interest(legal interest + x) is always one percent rate lower than the limit established by Law 7,Mar,1996,n. 108 and Law Decree 20th,Dec,2000, n. 394 and subsequent amendments,yearly,without this precluding the faculty of the SELLER to protect its interests by the way it shall deem the most appropriate one,including the suspension of its warranty obligations nor SELLER's right to amend the payment terms agreed b广告een SELLER and the purchaser. 这是我们要进口机械的合同中的两个小语段，兄弟求帮助，感谢。