密合的端盖 Closed end plate

紧密结合的 close-knit ; cohesive

互相密合着的 coherent

紧密结合的社区 close-knit communities

刚柔结合的密封区 rigid-flexible joint of sealed zone

接合面密封的由壬 ground-seat union

接合面的密封件 connection seal

基于密度的耦合求解器 Density-based coupled solver

紧密的联合起来 Closely unite ; By working closely together

需要紧密的合作 Require close and seamless cooperation