What I do is that I select a hard stone hammer.
我要做的是,我选择一个坚硬的石锤。
The hard, woody, outer peel is so hard that it has to be cracked with a hammer.
木质硬壳硬到不得不用锤子才能砸出裂缝。
The babbitt adjustable Hammer-Blow Sprocket Rim is for use with hard to operate gate, globe and Angle valves in overhead locations.
对于高度超过头部,操作困难的闸阀、截止阀和角阀,可以采用巴氏可调节锤击链轮。
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