英语翻译this standby letter of credit is available by payment ag

英语翻译
this standby letter of credit is available by payment against the beneficiary's signed statement exactly certifying that Heng sheng Machinery hase failed to full fill the contractual obligations under the contract no.1（no.1 是合同号） partial drawings are allowed
all banking charges including reimbursement fee outside taiwan are for applicant's account
the letter of guarantee is subject to international standby practices isp98(icc publicatton no.s90)

This standby letter of credit is available by payment against the beneficiary's signed statement exactly certifying that Heng sheng Machinery has failed to full fill the contractual obligations under the contract No.1. Partial drawings are allowed.
当受益人签署声明,明确规定恒生机械厂（你们公司名?你自己确认下）没有完全尽到合同1中规定的义务,这种情况下进行付款时,该备用信用证有效.允许分批支款.
All banking charges including reimbursement fee outside taiwan are for applicant's account.
在台湾省以外,包括偿付费在内的所有银行费用应由申请者（买方）承担.
The letter of guarantee is subject to international standby practices isp98 (icc publicatton no.s90)
这份信用保证书适用于国际备用证惯例(ISP98)（国际商会出版物s90号）.
再问： 不明白什么意思？？恒生是供应商，是他们开给我们保函让我们支付预付款的呀！能否说的浅显一点哈
再答： This standby letter of credit is available by payment against the beneficiary's signed statement exactly certifying that Heng sheng Machinery has failed to full fill the contractual obligations under the contract No.1. 兹声明，（贵公司）进行预付款后，若恒生机械厂未完全尽到合同1中规定的义务（即未给贵公司发货），该备用信用证（保函）有效（即贵公司可要求银行退还预付款）。 Partial drawings are allowed. 允许分批支款。 All banking charges including reimbursement fee outside taiwan are for applicant's account. 在台湾省以外，包括偿付费在内的所有银行费用应由申请者（买方）承担。 The letter of guarantee is subject to international standby practices isp98 (icc publicatton no.s90) 这份信用保证书适用于国际备用证惯例(ISP98)（国际商会出版物s90号）。