14493 contract law/ interpretation of contract Civil Code contract law volume 4 interpretation of contract variation of contract Federal supreme court of Ethiopia cassation decisions ውለታዎች ግልጽ በሆኑ ጊዜ ዳኞች ግልጽ ከሆነው በመራቅ የተዋዋዮች ፈቃድ ምን እንደነበር ለመተርጐም ስላለመቻላቸው የፍ/ብ/ህ/ቁ.2298 1733 Cassation 14932