... 腰间悬重皮带 Dip Belf 光杆最大悬重 peak polished rod load 悬重曲线 catenary curve ...
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The peak polished rod load occurs near the bottom of the stroke with the start of the upstroke.
最大光杆负荷发生在上行冲程开始时的冲程底部附近。
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The difference in the peak load on the upstroke and the minimum load on the downstroke of a polished rod.
光杆上行冲程时的最大负载与下行冲程时的最小负载之差。
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