Open items, especially down, must be careful of parts and the key of avoid assembled harder in the future.
拆开物品时，分外须留神零件和钥匙的收放，避免日后拼装艰难。
Especially, the system of excavation is one of key parts of TBM.
尤其是盾构的开挖系统是盾构机组成系统的核心之一。
Especially, the system of excavation is one of key parts of TBM.
尤其是盾构的开挖系统是盾构机组成系统的核心之一。
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