- 滑: slippery; smooth
- 块: piece; lump; chunk
- 定位: fixed position; location; or ...
- 定位块: distance piece; distance plate; location lump, locating piece, block stop; location lump, locating piece, location block; locationlump,locatingpiece,blockstop; locking block; set piece; stock located block; stock locater block
- 不良块定位: location of bad block
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