Glymwr
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Fel prif gydran y caewyr, defnyddir golchwyr fel arfer mewn cyfuniad â chnau a bolltau, a ddefnyddir fel arfer i atal llacio a achosir gan bwysau neu ehangu thermol a chrebachu rhwng dau wrthrych. It is used in many fields such as construction, industrial manufacturing, and assembly. This type of product has small size, large usage, long service life, easy replacement, and low economic cost. It is one of the essential material accessories for many industries.
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