He hit the nail squarely on the head with the hammer.
他用锤子正对着钉子敲下去。
Put the hat on my head, but don't put the hammer on my hand.
把帽子放在我头上，但是不要把锤子放在我手上。
Advantage: frame can open, make replacing hammer head, back plate and lining board work easier.
优势：机架可以开启，使得更换锤头、反击板及衬板的工作更加简便易行。
Advantage: frame can open, make replacing hammer head, back plate and lining board work easier.
优势：机架可以开启，使得更换锤头、反击板及衬板的工作更加简便易行。
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