Sudah pernah liat tes tarik besi belum? . Tes tarik besi ini umumnya dilakuin untuk mengetahui tingkat kekuatan besi dan karakteristiknya. . Ngerjain bangunan speknya musti sesuai aturan kan ya? Di proyek lapas mataram pun begitu, besi-besinya semua diuji
by suryanipalamui 5 years ago | via Instagram

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by derg6 7 years ago | via Instagram

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by derg6 7 years ago | via Instagram