... photographic borehole survey 钻孔摄影测量 pick hammer 鹤嘴锤 Pickard core barrel 皮卡德岩心管 ...
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You should learn to use a hammer before you pick up a nail gun. Likewise, you should become comfortable managing classes manually before you try to use more powerful tools.
在想要使用电动射钉枪之前要先熟练使用锤子，与此相似，在试图采用更强大的自动管理工具之前也要先能自如地手动管理这些类。
Even pace is a piece of rock, it would burst out sparks, as long as you pick up the hammer drill steel.
即使脚步下是一片岩石，它也会迸发出火花，只要你拿起铁锤钢钎。
The impulsive force of the hammer of the Machine can reach 30t, to replace the big hammer, and air pick, which can well treat with the cement concrete.
该机器锤头冲击力可达到30t，代替大锤、风镐，是水泥混凝土的克星。
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