“stem against”可以造什么句，stem against造句

The upper stem is threaded into the diaphragm retainer nut. When the handwheel is rotated to the closed position the upper stem pushes on the diaphragms, which deflect downward, forcing the lower stem against the valve seat.

The day wore away, and even through the twilight they could see the lone ivy leaf clinging to its stem against the wall.

Even through the twilight they could see that clinging to its stem against the wall was the long ivy leaf.

When the handwheel is rotated to the closed position the upper stem pushes on the diaphragms, which deflect downward, forcing the lower stem against the valve seat.