(ภาษาไทย) ประกาศประกวดราคาเช่าพื้นที่โฆษณาและสื่อประชาสัมพันธ์ LED เชียงใหม่ กรุงเทพและปริมณฑล ด้วยวิธีประกวดราคาอิเล็กทรอนิกส์ (e-bidding)

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