longitudinal gradient 　纵向坡度
loose fill 　松土〔斜坡〕；疏松填土
loose finish 　松脱批荡
loose rock 　疏松的碎石
loosely compacted slope　 夯压不足的山坡
loss or damage due to contractor's risks 　由承建商承担风险的损失或损害；由承办商承担风险的损失或损害
loss or leakage of grout 　薄浆流失；薄浆漏出
lot 　地段
lot amalgamation 　地段合并
lot boundary 　地段界线
lot identification 　地段鉴辨
lot identification plan　 地段鉴辨图
lot index plan 　地图索引图
lot number 　地段编号
lot owner　 地段业权人
louvre blade 　窗叶
louvre window 　百叶窗；气窗
low air-entry ceramic disc 　低空气进入流量陶碟
low cost housing estate 　廉租屋
low density residential development 　低密度住宅发展
low interest mortgage loan 　低息按揭贷款
low strength concrete　 低强度混凝土
low to moderate risk　 低至中等风险
low water　 低潮
low water mark 　低潮位
lower catchment area 　下段集水区
lower ground floor 　地下低层
lower high water 　低高潮
lower low water 　低低潮
lowest group permitted to tender 　准许投标最低组别
lowest tender　 出价最低的投标书；最低价投标
lowland rural area 　低地乡郊地区
low-lying land 　低地
low-rise building 　层数较少大厦
"luen fu" 　暖符
Lugeon test 　吕容试验
lumen [lm] 　流明〔光通量单位〕
luminance level 　亮度
lump sample 　剥落样本
luting paste　 封填膏
lux 　勒克斯〔光度单位〕（考试大咨询工程师）