知识贝壳
知识贝壳
所属栏目：建筑施工英语
Ordinarycranes,usedintheconstructionindustryorforloadingships,canliftweightsofupto200t.Butconsiderthefollowingproblems:aprefabricated1,500tsectionofaship(suchasthewholesuperstructureorthefrontpartofthebow)hastobeplacedinitsfinalposition;a6,000trockethasto ......（本文共 6553 字 ） [阅读本文] >>