led="expression" type="button" class="btn btn-md btn-default"
                                                        ng-click="cracker.testSwitch= 'MAO_YAN'"
                                                        ng-class="{'btn-success':cracker.testSwitch == 'MAO_YAN' }">冒烟测试
                                                </button>
                                            </div>
                                        </div>
                                    </div>
                         