const searchPopup_search_default = document.getElementById('search-default-content');const searchInput_search_default = document.getElementById('search-default-input'); // 监听实例的弹窗显示状态变化 const observer_search_default = new MutationObserver(() => {// 当弹窗从隐藏变为显示时，执行当前实例的输入框聚焦 if (searchPopup_search_default.style.display !== 'none' && !searchPopup_search_default.hidden) {searchInput_search_default.focus(); // 核心聚焦方法 // 可选：聚焦后选中输入框内内容，方便直接替换（按需开启） // searchInput_.select(); observer_search_default.disconnect(); // 聚焦一次后断开，避免重复触发 }}); // 启动当前实例的监听，仅监听自身弹窗的属性变化，各实例完全独立 observer_search_default.observe(searchPopup_search_default, {attributes: true,attributeFilter: ['style', 'hidden', 'class'] // 仅监听关键属性，性能最优 });

Test Equipment by Instrument Brand

Our agent sales of domestic and foreign well-known test instrument brands, each brand has a high share of the laboratory in the country, this page is mainly used to summarize the display of my company can be sold according to the instrument brand classification of the test instrument, please click on the brand icon below to view the list of domestic and foreign brands of test instrumentation and equipment.