ESAR http://irplus.eng.usm.my:8080/ir_plus/viewContributorPage.action;jsessionid=EA61F127DF0FB7664D45CB5915525001?personNameId=12319 Contributor Page for: ESAR EngLib USM BS EN 61689:1997 - Ultrasonics. Physiotherapy systems. Performance requirements and methods of measurement in the frequency range 0.5 MHz to 5 MHz http://irplus.eng.usm.my:8080/ir_plus/institutionalPublicationPublicView.action;jsessionid=EA61F127DF0FB7664D45CB5915525001?institutionalItemVersionId=14550 Printed version of this is available at library. To request, please e-mail to referencepk@usm.my and include a copy of this record in your e-mail. Wed, 18 Mar 2026 16:13:17 +0800 institutional_item_version_id:14550