| 1. | Practice for hdpe manholes for subsurface applications
地下高密度聚乙烯人孔惯例
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| 2. | Inspection manhole lid made of polymer matrix composites
聚合物基复合材料检查井盖
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| 3. | Manhole closures for pressure vessels of stainless steel
不锈钢制压力容器用人孔盖
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| 4. | Manhole tops classes a 15 and b 125 , circular ; frames
A15和b125级圆形人孔顶部.框架
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| 5. | Manhole covers for bunkers and tanks on ships ; seals
船舶贮舱和液槽的人孔盖.密封件
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| 6. | If we could get that manhole cover up . .
要是我们能把那个下水道入口盖打开. .
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| 7. | Manhole closures for pressure vessels of non - alloy steel
非合金钢制压力容器用人孔盖
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| 8. | Railway applications - tank wagons - part 6 : manholes
铁路设施.油罐车.第6部分:人孔
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| 9. | Construction of manhole s9 to s10 at maintence access track
于维修通道兴建s9 - s10沙井
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| 10. | If we could get that manhole cover up
-要是我们能把那个下水道入口盖打开
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