top view of short M-X spring top view of vertical X-X spring top view of horizontal M-M spring top view of horizontal X-X spring top view of armchair M-X spring top view of slant X-X spring top view of zigzag M-X spring side view of interlayer X-X spring
side view of short M-X spring side view of vertical X-X spring side view of horizontal M-M spring side view of horizontal X-X spring side view of armchair M-X spring side view of slant X-X spring side view of zigzag M-X spring
N/m short M-X vertical X-X horizontal M-M horizontal X-X armchair M-X slant X-X zigzag M-X interlayer X-X
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yx — — −xy −xy — −xy —
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zx — — −xz xz xz
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zy — — — yz — −yz —
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