男朋友舌头伸到下面很肿胀,蜜臀国产在线视频,精品97国产免费人成视频,亚洲 欧美 综合 在线 精品

Wire drawing dies made with the CVD diamond are widely used in drawing stainless steel, tungsten, molybdenum, copper, aluminum and various alloys.
• polycrystalline structure, no distinction between soft and hard surface.
• high hardness:8000~10000Kg/mm²
• good wear resistance
• Thermal Stability: ~1200C(protected by Argon).
•Single or double sided polishing available.
Normal size: