The octal tube socket is surface mounted to the breadboard.

电子管插座是安装在底板上的面板式插座。

Locate and unsolder surface mount resistor "A" (see picture below) be carefull!

找到并去除贴片电阻“A”（看下图）要小心！！！

This document identifies the classification level of nonhermetic solid-state surface mount devices (SMDs) that are sensitive to moisture-induced stress.

本标准用于确定非气密封装的表面安装器件（SMD）的湿气敏感度等级。