延展信用证有效期  to extend a credit

长期信用证  long credit

保证信用证  standby credit

保兑的不可撤销的信用证  confermed irrevocable letter of credit

不可撤回的信用证  irrevocable letter of credit

不可撤销保兑信用证  irrevocable and confirmed credit

不可撤销承兑银单信用证  irrevocable documentary acceptance credit

不可撤销无追索权信用证  irrevocable without recourse LC

不可撤销信用证  irrevocable letter of credit; irrevocable LC

不可分割信用证  indivisible letter of credit

飞机使用可用度  Aircraft operational availability

费用可用度  cost availability

光合作用可用光光子通量PPFD  Photosynthetic photon flux density PPFD

可撤销信用证  revocable letter of credit

可分割信用证  divisible letter of credit

可信可控  Trustworthy and Controllable

可信可控网络  Trustworthy and Controllable Network

可信信道  trusted channel

可信用电子商务  Credibility e-Commerce