1. The closing of a door is irrevocable. һ���ŵĹر��Dz�����صġ�
2. We will open an irrevocable letter of credit with your company as the ~. ���ǽ������Լ���Ϊ�����˿���һ�ݲ��ɳ���������֤��
3. We'll open an irrevocable letter of credit in your favor within 10 days from the date of the contract. �Ӻ�ͬǩ��֮�������ǽ���10���ڿ������㷽Ϊ�����˵IJ��ɳ���������֤��