សាលារង់បំពុល ផ្ទះធ្វើការបង្កើតជាមុន ហាងរថយន្ត ទូរស្ទឹងដែលធ្វើពីថាមពលគីមី สะพานเหล็ก ផ្ទះដែលធ្វើពីប្រអប់ หัวจรวด ตึกสร้างด้วยโครงสร้างเหล็กอื่นๆ