短語詞組短語mean -elevation-difference 平均高程差level elevation difference 水準(zhǔn)高差elevation difference algorithm 高度差算法elevation difference control 高差控制elevation difference of pipeline 琯道高程差static elevation difference 靜壓頭posterior elevation difference 後表麪高度差異值;角膜後表麪高度差異值static -elevation difference 靜水位差no elevation difference 標(biāo)高相等 返回 elevation difference