单词	固定氮肥
释义	固定氮肥 fixed nitrogen fertilizer
随便看	Large-span architectures large span arch structure large-span arch structure large span awning large span beam bridge large span board large span box arch large span bridge large-span bridge large-span bridge on highway large-span bridges large-span bridge structure Large span bridging machine large span cable large-span cable-staged bridge large span cable-stayed bridge large-span cantilever beam large span changeable section large-span-closed roof large-span coal transport trestle large-span concrete large-span concrete box girder large span continuous beam large span continuous beam bridge large span continuous box beam