แผ่นระบายน้ำพลาสติก HDPE มีรอยบุ๋มแผ่นระบายน้ำสำหรับฐานระบายน้ำที่มีประสิทธิภาพ

China Railway Construction Engineering Group Hangzheng Reserve out of commercial and residential projects with a total land area of 68,527.9 square meters, divided into above ground and underground, above ground for residential buildings, apartments, offices and commercial, with a total construction area of about 270,000 square meters, with a construction area of about 140,000 square meters above ground and 130,000 square meters underground. The contract is for plastic drainage board.