hardened steel rod

20 ミクロン- 30 ミクロン ピストンは管、望遠鏡シリンダー管を砥石で研ぎました

20 micron - 30 micron Piston Honed Tube , Telescopic Cylinder Tube Detailed Product Description Telescopic Cylinder Tube and Piston Tube Our precision seamless tubes are suitable for the manufacture of pistons, telescopic cylinder. We can supply hard chrome plating for the telescopic cylinder tube as well, and the technical delivery conditions refer to the next page. A comparison of tubular piston rods versus solid piston rods of the same diameter based on identical