zhè / bǎ / sǔn / záo / de / dāo / kǒu / hěn / fēng / lì / shǐ / yòng / shí / yào / tè / bié / xiǎo / xīn

这把榫凿的刀口很锋利，使用时要特别小心。

The blade of this mortise chisel is very sharp, so be especially careful when using it.