reduced pendulum length [地物] 折合摆长
equivalent pendulum length 等值摆长
Allowed Pendulum Length 摇摆长度
equivalent length of pendulum 等效摆长
length of equivalent pendulum 等摆长度
length of pendulum 摆长
equivalence length of pendulum 等值摆长
simple pendulum with varying length 变摆长单摆
equivalent eccentric length of pendulum 等值单摆长
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This is how he adjusts the time by changing the length of the pendulum.
UNESCO: Culture
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