cruciblen.柑锅；熔炉；严酷的考验crucible contamination坩埚沾污crucible steel melting坩埚钢熔炼crucible pouring device[机] 坩埚浇铸装置crucible for laboratory技工用坩埚crucible steel moldboard坩埚钢犁壁crucible melting furnace坩埚式炉crucible swelling number坩埚膨胀序数crucible tilting furnace倾动式坩埚炉crucibleless zone melting无坩埚区熔法crucible for glass fusion熔化玻璃用坩锅