[名词解释] 硬合金钻头

外墙饰面砖粘贴立面垂直度的允许偏差为（）. ["4mm","3mm","2mm","1mm"] 磨锐式钻头 以下哪种指令需投资者拥有标的证券才能申报（）。 ["A、买入开仓","B、卖出开仓","C、卖出平仓","D、备兑开仓"] 内墙饰面砖粘贴立面垂直度的允许偏差为（）mm. ["4","3","2","1"] 不取芯钻头 硬合金钻头