The bearings are classified by elements as single row, double row and multiple row bearings.
根据滚动体排列情况，可以把这类轴承划分为单列、双列和多列。
Double row cylindrical roller bearing is applied on machine tool principal axis.
双列圆柱滚子轴承适用于机床主轴。
Double row pile, as a new form of support, is more widespread used in engineering.
双排桩作为一种新型支护形式，在工程中使用越来越广泛。
Double row pile, as a new form of support, is more widespread used in engineering.
双排桩作为一种新型支护形式，在工程中使用越来越广泛。
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