我感觉有榫舌和凹槽的木材才是环保的。
I suppose the environmental way would be to use tongue-in-groove lumber.
榫舌可设在每块厚板的与凹槽相对的侧面上。
The tongue can be on the opposing side of each plank from the groove.
目前实木地板市场中大多数为企口实木地板，该地板在生产加工过程中，由于加工榫舌而产生木材浪费。
At present, the tongue-and-groove wood floor was an overwhelming majority in the market of wood floor, and a lot of woods was wasted during its processing.
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