久久无码人妻一区二区三区午夜_久久久久精品久久久久影院蜜桃_亚洲综合欧美色五月俺也去_交换娇妻呻吟声不停中文字幕

塑料洛氏硬度計是一種專門測試非金屬塑料、硬橡膠、合成樹脂、摩擦材料及較軟金屬的硬度計。測試對象特殊，操作簡便。試驗力的施加、保荷和卸荷自動完成，消除人為操作誤差。

適用范圍
硬塑料、硬橡膠，鋁、錫、銅、軟鋼、合成樹脂及磨擦材料等。

XHR-150 Plastics Rockwell Hardness Tester adopts motorized testing method. Its testing force can be loaded, kept and unloaded automatically. Avoid man-made error and easy to use. It is therefore, welcomed by many users.

Usage Range:
Hard plastics, hard rubbers, aluminum, tin, copper, soft steel, synthetic resins, fricative materials, etc.