single welding and double faced forming

single-run line

single-run stairwell

back run welding

multi-run welding

Girth Welding∥Welding Auxiliary Device

tungsten inert-gas welding welding

SIGMA welding (MIG welding, Metallic Inert Gas Arc welding)

“single seat， single vote” system

1# Generator Single Unit Initiating Single Pump

cable-stayed bridge with a single tower and single

cable-stayed bridge with single cable plane and single tower

cable-stayed bridge with single pylon and single c

dual single-input single-output model

fiber optic cable， single mode， standard， tightly buffered， single fiber

SDSL Single-Line Digital Subscriber Line，Single-Line DSL

single box single room

single channel single pulse

single column over single pile