Determine the proper bushing length from the thickness of the center member to be inserted between the friction facings. 由設于摩擦板間的中心構件厚度，決定正確的軸襯長(cháng)度。
Structural floor framing members are usually dimension lumber or engineered wood products. 結構樓板框架構件通常是規格材或工程木制品。
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