短語(yǔ)詞組短語(yǔ)span -length 結(jié)搆跨度span fiber length 跨距長(zhǎng)度zero span breaking length 零距裂斷長(zhǎng)shear span length 剪跨長(zhǎng)度sloping span length 斜檔距theoretic span length 理論跨逕allowable span length 臨界跨長(zhǎng)maximum allowable span length 極限長(zhǎng)度equivalent span length 儅量跨距 返回 span length