タイトルまたは説明

YAC,Sanitary Fixed-Type Manhole YAA ,Sanitary Quick-Open Breathing Manhole YAH ,Sanitary Outaide-Open Common Pressure Manhole YAD ,Sanitary Quick-Open Breathing Manhole Yah ,Sanitary Rectangle Manhole Yae ,Sanitary Wacthing Manhole YAG )

Type: SquarenessRoundnessOvalHand Hole Cover
Material: *****6L*****4L**6
Fineness: Inner and outer fineness of mirror Ra≤ 0.8μ M,
Inner and outer mechanical Polish and electrical Polish Ra≤ 0.2μ M,
External surface can be gross polished or sub-gross polished.