covering layer造句怎么写

Theoretical analysis using the method of energy equilibrium in covering layer and validation of the overall heat transfer coefficient of greenhouse covering materials;

The crack repairing technology of unballasted track and bridge covering layer of special railway line for passenger transportation

A layer of a substance spread over a surface for protection or decoration; a covering layer.

With sulfuration metal flange and asbestos covering layer.

Loose covering layer that consisted of water containing fine powder sand layer was encountered in the overcasting at Zhaodianzi Iron Mine.