ExtJS 表单文本框的属性name过长 调整哪个属性可调节

如图所示 例如银行承兑汇票有效期 或者 银行承兑汇票注销日期 这两个文本框前的name ，由于字数过多，给流出的长度无法满足，应该改哪个属性才合适。
columnWidth这个属性不行 它主要是改后面的文本框长度的

    var loanCompactForm = Ext.create('Ext.form.Panel', {

        buttonAlign: 'center',

        id: 'form_loanCompact',

        layout: "form",

        bodyStyle: {

            padding: '10px'

        },

        frame: false,

        border: 0,

        defaults: {

            labelWidth:120

        },

        items: [

            {

                layout: 'column',

                items: [

                    {   layout: 'form',

                        columnWidth: .3,

                        items: [form_1]

                    },

                    {   layout: 'form',

                        columnWidth: .3,

                        items: [form_2]

                    },

                    {   layout: 'form',

                        columnWidth: .3,