按主体词字母查询
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W
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subsoil water 地下水,底土水
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subsurface water 地下水,底土水
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subterranean water 地下水,底土水
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superficial water 表层水,地面水
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supergene water 下降水
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superpermafrost water 永冻土上层水
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surface water 地面水,地表水
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portable weir 活动[量水]堰
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proportional weir 正比堰(流量与水头成正比的)
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rectangular contracted weir 矩形收缩堰
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rectangular notch weir 矩形缺口堰
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regulating weir 节制堰
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river weir 拦河堰
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rock-fill diversion weir 堆石引水堰,堆石导流堰
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roller weir 圆辊堰
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