1. 覆以皮：incross 杂种 | incrust 覆以皮 | incrustation 结壳

2. 包以外壳表面结皮：incremental 增量的 | incrust 包以外壳表面结皮 | incrustation of piston 活塞结垢

3. 长硬壳、包壳、形成水垢、形成炉瘤：increment of displacement位移增量 | incrust长硬壳、包壳、形成水垢、形成炉瘤 | incrustation包壳、结壳(痂)、积(水)垢、渣壳、矿渣

4. 形成外皮：incrust 生外皮 | incrust 形成外皮 | incrust 覆以皮

verb

1. form a crust or a hard layer

Synonym: encrust

2. cover or coat with a crust

Synonym: encrust

3. decorate or cover lavishly (as with gems)

Synonym: encrustbeset