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单词	trench box
释义	trench box trench box, trench shield trench box A heavily braced box of wood or steel which can be moved along a trench bottom as excavation and pipe laying
随便看	ccnshs ccnsi ccnso ccnsp ccnss ccn sturt ccnsw ccnt ccnt1 ccnt2 ccnta c/c/ntk ccnto ccntr ccnu ccnucc ccnum cc-numa ccnuma cc nv ccnv ccnw ccny ccnyc ccnz

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