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The lumbar support roll should fit into the curve in your lower back.
腰支持辊应与您下背部曲线相配合。
youdao
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Entry strip support table, looper roll and four-point centering device.
进料支撑台，跳动辊，四点对中装置。
youdao
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Entry strip support table, looper roll and four-point centering device.
进料支撑台，跳动辊，四点对中装置。
youdao