偷工减料建筑 meaning in Chinese

jerry-built construction

As some of the persons involved had migrated investigators had to make overseas trips to collect evidence . as the investigation progressed , the gravity of the case grew with it . the rate of cement to screed as set by the works bureau at the time was 1 : 5 to 1 : 7 , however the 26 blocks were found to have a ratio as low as 1 : 19 . 2
调查工作暴露了建造工程出现的严重违规情况例如偷工减料建筑石屎成份严重偏离工务局要求英泥对沙石一比五至一比七的比例，只达一比八点三，甚至差至一比十九点二，完全妄顾楼宇安全。