【Angela Yang】評論

which 是關代 根據前句 the detonator for a nuclear device may be made of two pieces of equipment, 有主詞動詞S=the detonator for a nuclear device V=may be made後句也是一個完整句子有主詞動詞 , 因為有動詞is 兩個句子要有關代或連接詞ex. and來連接，所以只能選有which 的D each of whichdetonatorn.引爆装置，雷管，起爆管As a safety measure, the detonator for a nuclear device may be made of two pieces of equipment, each of which is controlled by a different employee.作為一種安全措施，雷管的核裝置可以由兩件設備，其中的每一個由不同的僱員進行控制。

【whale66622】評論

主要子句+，+數量詞+of+關係代名詞 (whom/which)+形容詞子句                                            *whom人 / which物As a safety measure, the detonator for a nuclear device may be made of two pieces of equipment,         each of which is controlled by a different employee. ex: John has taught many students, two of whom have become great scientists.