weight-driven clock mechanism
/vˌɪdɪəʊkɐsˈɛt ɹɪkˈɔːdə vˌiːsˌiːˈɑː/
n
中文：重锤驱动机芯
Meaning：This clock is operated by weights that, under gravity, drive the hands of the clock in their rotational movement by means of a gear train.
中文：重锤驱动机芯