铃碗

líng wǎn biǎo miàn dù pī qīng tóng dǎ jī shí bù huì yǐn qǐ huǒ huā

铃碗表面镀铍青铜，打击时不会引起火花。

The bell-bowl plated by be-bronze will be no spark when it is stricken.