The technician checked the fastness of every bolt before the machine was shipped.

技術人員在機器出貨前檢查了每顆螺栓的牢固程度。

Please confirm the fastness of the shelving units before the warehouse inspection on Monday.

請在週一倉庫檢查前確認貨架的牢固程度。

Hotel staff tested the fastness of the handrails after a guest reported a loose one.

有房客反映扶手鬆動後，飯店員工測試了扶手是否牢固。