तस्यापिहितकाचकस्योदके निमज्जत एकदेशः सीदति पटलान्तरेषु वा सूच्या भिद्यते ॥ ॥
tasyāpihitakācakasya udake nimajjata ekadeśaḥ sīdati paṭalāntareṣu vā sūcyā bhidyate
ສໍາລັບສິ່ງນັ້ນທີ່ປິດຜະນຶກດ້ວຍຝາແກ້ວ: ເມື່ອຈຸ່ມລົງໃນນ້ໍາ ບາງສ່ວນຈະຈົມ; ຫຼືລະຫວ່າງຊັ້ນຕ່າງໆ ຖືກຈິ້ມດ້ວຍເຂັມ (ເພື່ອທົດສອບ)។
They are quick, low-cost, and reproducible—ideal for routine enforcement by inspectors without specialized equipment.