在水电站压力引水钢管或钢蜗壳外表敷设软垫层材料以满足结构受力要求的工程措施称之为垫层管或垫层蜗壳。
The penstock and spiral case with elastic layer are defined as a engineering measure of having flexible layer material surrounding it to meet the needs of bearing loads in structure.
在水电站压力引水钢管或钢蜗壳外表敷设软垫层材料以满足结构受力要求的工程措施称之为垫层管或垫层蜗壳。
The penstock and spiral case with elastic layer are defined as a engineering measure of having flexible layer material surrounding it to meet the needs of bearing loads in structure.
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