ISO 1031:1974现行
Coniferous sawn timber - Defects - Terms and definitions
出版：International Organization for Standardization
专家解读视频
Relates to classification in ISO 1029. Covers unplaned sawn timber and such surfaced to size or planed but without profiling. Examples are shown in many figures. Replaces R 1031 and is a trilingual edition.
UNE 56520:1972 - Identical
UNE 56521:1972 - Identical
UNE 56522:1972 - Identical
DIN 68256 (1976-04) - Identical
UNI ISO 1031:1983 - Identical
NFB 50 002:1961 - Similar
