对废旧井巷和采场的封闭可选用防氡性能较好的涂层(喷涂)如:偏聚氯乙烯共聚乳液的防氡率可达70%密闭可用 PVC 单面、双面维纶布和防水卷材组合材料,膨胀螺栓或射钉固定,其密闭阻风效果可达90%,防氡效果可达()
A.78%
B.80%
C.85%
D.88%
E.91.5%
查看答案
正确答案: D 答案分析:无
包含此试题的试卷:
相关的试题
A.78%
B.80%
C.85%
D.88%
E.91.5%
A.78%
B.80%
C.85%
D.88%
E.91.5%
A.78%
B.80%
C.85%
D.88%
E.91.5%
A.78%
B.80%
C.85%
D.88%
E.91.5%
A.78%
B.80%
C.85%
D.88%
E.91.5%
A.78%
B.80%
C.85%
D.88%
E.91.5%
A.78%
B.80%
C.85%
D.88%
E.91.5%
A.78%
B.80%
C.85%
D.88%
E.91.5%
A.78%
B.80%
C.85%
D.88%
E.91.5%
A.78%
B.80%
C.85%
D.88%
E.91.5%