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Title: Alat bor eksplorasi - PowerPoint PPT Presentation
Description: Alat bor eksplorasi Type alat bor eksplorasi : Dalam tahap eksplorasi batubara, ada 4 type alat bor yang dapat digunakan : 1. Rotary drilling 2. – PowerPoint PPT presentation
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PPT URL: https://hamast.wordpress.com/wp-content/uploads/2011/04/alat-bor-eksplorasi.ppt
