短語(yǔ)詞組短語(yǔ)flat -sheet extrusion 平片材擠塑flat liquid sheet 平液膜flat clear sheet class 扁清楚表類;平明確表類asbestos flat building sheet 石棉平板flat drawing sheet 折頁(yè)圖Flat Screening Sheet 平面篩板 返回 flat sheet