simple lock
更换一个单机闸门 Change a single-pole switch
单级闸门 single lift lock
单门船闸 single gate lock ; Lock single gate ; single gate lock west bank
单通道闸门 single-lane lock
单扇形闸门 single quadrant gate
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根据浮体闸门的构造特征，建立了单自由度非线性振荡模型。
According to the structural feature of the floating gate, a nonlinear single - degree of harmonic oscillating model is set up.
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