trenchn.沟;沟渠;战壕v.挖沟;侵占
trench etching槽腐蚀
trench surplus挖沟余土
trench cutting开沟
trench latrine沟厕
Trench cutters双轮铣
trenching shot开沟爆破
trenching area挖槽区
trench plowing超深耕
trench warfaren.堑壕战
trenching body开深沟犁体