मुखसमः संक्रमः संहार्यो भूमिमयो वा निरुदके ॥ कZ_०२.३.३० ॥
mukhasamaḥ saṃkramaḥ saṃhāryo bhūmimayo vā nirudake
通道/接近道(saṃkrama)应与门前正面齐平(mukha-sama);应可拆除(saṃhārya),否则在无水处(nirudaka)以土筑成(bhūmimaya)。
It allows the defender to deny entry quickly during attack, converting access routes into obstacles.