ประกาศผู้ชนะการเสนอราคา จ้างซ่อมแซมปั๊มสูบน้ำ จำนวน 4 ตัว และเปลี่ยนหัวเติมอากาศ ระบบบำบัดน้ำเสีย ฮิปโปโปเตมัส โดยวิธีเฉพาะเจาะจง

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