Answer
'Gwargwadon mai' ko 'snap-through' wani nau'i ne na rashin kwanciyar hankali wanda ke faruwa a cikin maɓuɓɓugan ruwan raƙuman ruwa guda ɗaya lokacin da girman tsayin igiyar $h$ zuwa kauri $t$ ya yi yawa. Idan ruwan bazara ya danne, yana iya kaiwa wani wuri inda zai 'dauke' zuwa wani jujjuyawar siffa ko kuma yanayin da ba a kwance tare da faɗuwar kaya ba zato ba tsammani. Wannan a lissafin yana kama da murɗawar baka mara zurfi. Don guje wa wannan, masu zanen kaya ya kamata su kiyaye rabon $h/t$ a cikin kewayon inda yawan bazara ya kasance tabbatacce. Idan ƙimar $dk/df$ ya zama mara kyau, bazara ba ta da ƙarfi. Wannan yanayin rashin gazawa ne mai mahimmanci a cikin hanyoyin canzawa inda ake buƙatar danna maɓallin taɓawa mai kyau, amma gazawa ne a aikace-aikacen riga-kafi na tsari.
