Polish translation: studzienka dostępowa do zaworu
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Explanation: nie jest termin fachowy, a jedynie moja wersja na podstawie opisu: "If you have a curb box on your property, it is about 4 inches in diameter and is also located near the curb. The curb box gives CWA access to the master shut-off valve serving your home. With a curb box, the water meter will be inside your house." Całość w linku