<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">tube locks</topic></authority><related type="broader"><topic>percussion locks</topic></related><variant type="other"><topic>tube-lock</topic></variant><variant type="other"><topic>locks, tube</topic></variant><variant type="other"><topic>tube lock</topic></variant> <note xml:lang="en"><![CDATA[ Early type of percussion lock using a metal tube inserted into a hole in the breech to contain the priming powder, instead of the percussion cap which became standard later. ]]></note></mads>