﹥ 鍍膜球透鏡管帽編碼原則(Coding principles for AR coated ball lens cap) ﹥ 56GB2020H270C150A131155 (TO56 CAP) glass to metal seals ﹥ 56GB1515H297C100A131155 (TO56 CAP) Hermetically sealed ﹥ 56GB2018H297C100A131155 (TO56 CAP) Hermetically sealed
