Backing Sand
แปลว่า(english) The bulk of the sand in the flask. The sand compacted on top of the facing sand that covers the pattern.
หรือคุณกำลังค้นหา Bentonite, sandy, sandy loam, sandy clay loam, sandy clay, AFS Tests, Band, Inside, Sand (ASTM C125), core sand, sand finish, sand fill, soil separates