Assisted single delivery unspecified
Other single spontaneous delivery
Other single delivery by caesarean section
Other specified assisted single delivery
spontaneous single unit discharge
spontaneous single-units discharge
normal spontaneous delivery
Complication of labour and delivery unspecified
Multiple delivery unspecified
Outcome of delivery unspecified
Perineal laceration during delivery unspecified
“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