求翻译：从双方签字之日起生效，至双方重新签订本质量保证协议之前有效。在协议有效期间，如需改变协议 内容应经双方同意，任何一方无权擅自更改协议是什么意思？

From the date signed by both parties to sign a bilateral agreement before the effective quality assurance. Effective period of the agreement, the agreement for change should be agreed by both parties, either party right to arbitrarily change the agreement

From both sides, to come into force upon signature by both parties before re-entering into this quality assurance agreement effective. The Agreement is in force, and if necessary change content of the Agreement should be agreed upon by the parties, a Party shall not be entitled to any unauthorized a

Signs the date from both sides to become effective, signs in front of the essential quantity guarantee agreement to both sides effective.In agreement validity duration, if must change the agreement content to be supposed to pass through the mutual consent, any side has no right the arbitrarily chang

Sides date of signing until both sides renewed the quality assurance agreements before the. During the agreement period, need to change the agreement by mutual agreement, either party shall not be entitled to arbitrarily change the Protocol

Signed by both parties from the date of entry into force, to renewed this quality assurance agreement in force between the two sides. During the agreement period, need to change the agreement by mutual agreement, either party shall not be entitled to arbitrarily change the Protocol