challenged

challenged

ผลลัพธ์ (ไทย) 1:

ท้าทาย

ผลลัพธ์ (ไทย) 2:

7. 15.1.4.3 The quality ratio of cement to collected materials is 1:2.25, and a total of 440 g of cement (to 0.1 g) and 990 g (quality of each grade is measured separately in table 20, accurate to 0.1g). Water consumption is determined by GB/T 2419. The table beats at a frequency of 6s