UCDL：mapping mechanism
UNUX：LINUX
UCIM：Unified Communication Identity Management Center (UCIM)
U3平台：U3 platform
U型缝隙：U-slot
UI软件：UI software
U描述子：U descriptors
uDIG：uDig
U-滤波：U-filtering
U型布局：U layout
U形箱体：U-shaped cabinet
U形密封：U-type rubber seal
U形车架：U-frame
U形管子：U-pipe
U形焊缝：U-weld
U形剪口：notch
U形桨架：oar lock
U形联杆：U-link
U形领口：horse shoe neck line;oval neck line;U-neckline
U形坡口：single U groove
U形曲线：U-curve
U形缺口：U-notch
U形铁芯：U-core
U形弯管：U trap
U形线圈：hairpin coil
U形焰窑：end-port furnace
U形转折：U-turn
U型穿带：U-automatic threading
U型轨道：U rail
U型坡口：single U-groove
U型剖面：U-shaped section
U型轧剪：pattern notches
USB总线：USB bus
UV254：UV254
UAFSB：UAFSB
UML建模：UML modeling
umu试验：umu test
UG NX：UG NX
U形棚支护：U-type arch support
UOE机组：UOE mill
U-PVC：U-PVC
Uron环：uron ring
UC/OS：UC/OS
UOE制管：UOE welding tube
UBAF法：UBAF method
UV/O3：UV/O3
U形膨胀节：U-type expansion joint
USP认证：USP certification
U型聚合管：U-tube of polymerization
U形固定夹：U-shaped retaining clip