<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31348918</termId><termName>adjustable-pitch propellers</termName><termType>PT</termType><termNote><![CDATA[ Pilot-adjustable propellers that may change blade pitch during flight. The blade angle can thus be adjusted to its optimum value for the phase of flight, be it takeoff, climb or cruise. ]]></termNote><termCreatedDate>2026-03-30 20:34:09</termCreatedDate><relation><relationType>UF</relationType><termId>31348919</termId><termName>adjustable-pitch propeller</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31485263</termId><termName>variable pitch propellers</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31322980</termId><termName>propellers</termName><termType>PT</termType></relation></term>  </Zthes>