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Definitions4 characters
wang3 fu4 yun4 dong4
backwards and forwards action (e.g. of piston or pump)/reciprocating motion
Usage•••frequent
Pronunciations

As word

1
wang3
backwards and forwards action (e.g. of piston or pump)/reciprocating motion
2
fu4
backwards and forwards action (e.g. of piston or pump)/reciprocating motion
3
yun4
backwards and forwards action (e.g. of piston or pump)/reciprocating motion
4
dong4
backwards and forwards action (e.g. of piston or pump)/reciprocating motion