bù kě chè xiāo xìn yòng zhèng
irrevocable letter of credit
不
bù
no; not so
可
kě
(prefix) can; may; able to; -able
撤
chè
to remove; to take away
销
xiāo
to melt (metal)
信
xìn
letter
用
yòng
to use; to make use of; to employ
证
zhèng
certificate
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