“sandy gravel”造句，怎麼用sandy gravel造句

The cushion layer for the dam is constructed with the material prepared mainly with natural sandy gravel and mixed with proper amount of pebble and coarse sand.

Study of critical gradient of piping for various grain sizes in sandy gravels

High-pressure rotary swing grouting treatment technology for strong permeable sandy gravel complex formation

For the frozen weathered bedrock, sandy gravel and pebble bed, it is more suitable to use drilling and blasting method than to use the frozen soil excavator.

Application of sandy gravel replacement for weak subgrade treatment;

Through grouting practice of design and construction, it is proved feasible and cheaper to use dam heavy curtain grouting technology for leakproof and bracing for foundation pit in the sandy gravel stratum.

Water well construction using directional circulation drilling technology in sandy gravel aquifer