poor drill meaning in English
孔形不良
Examples
- Abstract : the traditional method of anchor pile on the deep foundation pit bracing in the gravel stratum with high hardness , poor drilling and easy slump is complicated owing to difficult construction , low efficiency and high cost
文摘:卵砾石地层硬度大，可钻性差，易坍塌，这种地层的深基坑支护若采用传统的锚杆桩，施工难度大，工效低，工程造价高。