2. Explain in detail:
(1) Deciduous tree (mountain hair ~), with a height of more than 20 meters and hard wood, can be used as sleepers and furniture. Also known as Cyclobalanopsis.
(2) wood name. Deciduous trees of Ulmaceae. Leaves alternate, oval and hairy. Leaves and bark can be used as medicine. Solid wood, fine-grained, waterproof and moisture-proof, can be used in shipbuilding, construction, bridges and so on.