短语词组短语bedding screed 地台砂浆底层wet screed 抹灰刮板extendable screed 可伸长的样板screed elevation 样板的升高screed lift 样板提升screed settling 样板沉降screed crown 样板顶冠screed burner 匀平器燃烧炉screed coat 找平层 返回 screed