?三层的

...三层的 three ply; threeply; treble; trilaminar; trilaminate; triple-deck; triple-layer; triple-pane; triplex; utd u er tweendeck; utd upper tweende...

?三层

... 两层或三层的双金属板 overlay clad plate 三层 three layer; three-layer; three-tier; threeply 是三个 cmdasp.asp ...

?三层厚

三层厚