時規皮帶(同步皮帶) 2015-10-09by dou dong 齒距 (mm) HTD 齒距 (mm) STD 齒距 (mm) MXL 2.032mm 3M 3mm S3M 3mm XL 5.080mm 5M 5mm S4.5M 4.5mm L 9.525mm 8M 8mm S8M 8mm H 12.700mm 14M 14mm S14M 14mm XH 22.225mm 20M 20mm XXH 31.750mm