waterproof layer of spraying-on membrane喷膜防水层
layer-on-layer foaming分层发泡
Link-Layer Connectivity Class-on-Demand链路层连接
wall boundary-layer interference on wing洞壁附面层对杨翼绕流的影响
-layer architecture based on component基于组件的三层结构
D-layer theory on proof standard多层次证明标准
3-layer architecture based on component基于组件的三层结构