Silfram
铬镍铁耐热合金
🗣️ 情景例句
No.
不。
She failed to call the office to cancel her appointment.
她没能打电话给办公室取消她的约会。
Oxygen is widely used in ship repairs for cutting and joining metal plates or pipes.
在船舶修理过程中，常常使用氧气切割和焊接金属板或金属管。