短語(yǔ)詞組

短語(yǔ)

• clay central core 粘土心牆
• clay impervious core 粘土防滲牆
• clay -core gravel sand dam 砂礫石粘土心牆垻
• clay central core embankment dam 粘土心牆土石垻
• inclined clay -core wall 粘土斜牆
• clay sloping core roch -fill dam 粘土斜心牆堆石垻
• clay core wall 粘土心牆
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