pack gravel 中文意思是什麼
pack gravel
解釋
充填礫石-
The metal wheels ground the gravel with a sharp grating cry and the pack of blunt boots followed the barrow along a lane of sepulchres
金屬軲轆磨在砂礫上,發出尖銳的嘎嘎聲。一簇靴子跟在手推車後面踏出鈍重的腳步聲,沿著墓叢間的小徑走去。 -
Recommended practice for gravel pack of sand control of the naked hole
裸眼井礫石充填防砂推薦作法
分享友人