Special attention shall be paid to small electronic components such as printed circuit boards that shall be protected by a varnishcoating.
应特别注意给小型电气组成，如印刷电路板的应受保护的油漆涂料。
2
Initial heating of the phenol and formaldehyde (in the presence of an acid or base to get the reaction going) produced a shellac-like liquid good for coating surfaces like a varnish.
开始加热，酚和甲醛(需有酸或碱促使其反应进行)便产生了像紫胶样的液体，能像清漆一样涂于物体表面。
3
Apply paint or other materials, such as stains, lacquer, enamel, oil, varnish, fibreglass, metal coating or fire retardant using brushes, rollers or spray equipment.