sulphur free-cutting steel

例句：

1. 1. This type of steel is commonly used in cutting tools due to its high hardness and strength.
   由于其高硬度和强度，这种钢材常用于切割工具。
2. 2. The manufacturer claims that their steel is free from sulphur, making it environmentally friendly.
   制造商声称他们的钢材不含硫，使其环境友好。
3. 3. The steel was chosen for its ability to resist corrosion and wear, which is essential for heavy machinery.
   这种钢材因其抗腐蚀和抗磨损能力而被选用，这对于重型机械至关重要。