It makes them easier targets for borers, and shows if the insects are nearby.
这会更容易成为钻孔者的目标来看是否有昆虫在附近。
tap(ping) drill
螺丝孔钻，螺丝底孔钻
The sorker was drilling.
此工人在用钻孔机钻孔。
Any of numerous hand tools for boring holes.
钻孔工具，手钻钻孔用的手持工具
kelly for well-drilling machiens
旋转钻孔,钻井机用
A tool used for drilling.
钻头用于钻孔的工具
boring method (of pulp sampling)
（纸浆取样）钻孔法
Drilling 50 yards deep,
钻孔至50码深处，
Using a drill, he bore a hole through the wood.
他用钻孔机在木头上钻了一个孔。
A hole or passage made by or as if by use of a drill.
钻孔，打洞用或似用钻打孔或通道
To make a hole in or through something with or as if with a drill.
钻孔，打洞用或似用钻打洞或穿孔
Drilling is cutting a hole with a drill.
钻削就是用钻头钻一个孔。
To make a hole in or through, with or as if with a drill.
钻，凿，开洞用或似用钻打洞或钻孔
To make a hole with or as if with a drill.
钻孔用钻或类似钻的工具打洞
Study on Drilling Tests of PCB Through-Hole Drilling
钻PCB通孔钻切削性能的钻削试验研究
A needle-shaped drill for boring holes in rock or masonry.
钻头，钻石器，钻孔器用于在岩石或砖石上钻孔的针形钻
A pointed and threaded tool for drilling and boring that is secured in a brace, bitstock, or drill press.
钻头曲柄、钻柄或钻床之上用于钻孔的尖头工具
Designed for wall drilling of concrete block or brick without using water.
在无水环境下，适用于混凝土或者砖块上钻孔取样。