MITSUBOSHI双面RPP齿型同步带日本MITSUBOSHI.MBL同步带.MITSUBOSHI三角带.MITSUBOSHI平皮带.MITSUBOSHI同步带轮MITSUBOSHI输送带MITSUBOSHIPU同步带MITSUBOSHI龙带双面RPP齿型同步带型号节距DRPP3M3MMDRPP5M5MMDRPP8M8MMDRPP14M14MM)