
BS EN 14081-3. Timber structures. Strength graded structural timber with rectangular cross section. Part 3. Machine grading; additional requirements for factory production control
出版:British Standards Institution

专家解读视频
BS EN 14081-3. Timber structures. Strength graded structural timber with rectangular cross section. Part 3. Machine grading; additional requirements for factory production control
出版:British Standards Institution
专家解读视频