Fenomena O-Ring di Chalcedony

12 thoughts on “Fenomena O-Ring di Chalcedony”

  1. Blh jg nih ilmu mau di praktek dulu besok.
    Apakah membuat fenomena O-Ring harus bahan genggang ?
    Arti nya bahan genggang tersebut di cari yg “sulaiman” nya sdh terbentuk O sebelum di olah apa demikian ?
    Apakah ada pengaruh jg terhadap Ring yang akan di pakai (ring model mangkok) ?
    Terimakasih

  2. Pa saya agak ter buru2 baca mungkin ga lengkap. Pertanyaan saya : alamat lab dimana? No telp lab ? Apa bisa antar jemput? Krn sy kebanyakan di airport. Trm ksh

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