- thoroughly reliable; certain not to fail
- 1. British thoroughly reliable; certain not to fail a copper-bottomed guarantee
... conclusion of this investigation is that the leakage was due to general copper corrosion. 調查結果顯示漏水的主要原因是銅材腐蝕 Corrective ...
...the doll to facilitate absorption of iron tablets to thin copper strips seesaw shape morphology. Chassis ...texture of wood. The chassis has a maintenance hole bottom, in order to facilitate future maintenance needs, so as not...