คำศัพท์ภาษาอังกฤษ
Ottawa Sand
แปลว่า(Concrete Engineering) A sand used as a standard in testing hydraulic cements by means of mortar test specimens. Sand is produced by processing silica rock particles obtained by hydraulic mining of the orthoquartzite situated in open-pit deposits near Ottawa, Illinois; naturally rounded grains of nearly pure quartz.
คำศัพท์ช่างภาษาอังกฤษ - ไทยที่คล้ายกัน
core sand green sand loamy sand open bubble sand sand blast sand fill sand finish sand paper sand trap standard sand strong sand
