[名词解释] 钻头

外墙饰面砖粘贴表面平整度允许偏差为（）mm. ["1","2","3","4"] 引起铆钉损坏，一般是哪种类型的载荷？（） ["剪切载荷","压缩载荷","扭转载荷","弯曲载荷"] 常用甘草汁炮制的药物有（）。 ["乳香","山茱萸","吴茱萸","巴戟天","远志"] 粗径钻具 内墙饰面砖粘贴表面平整度允许偏差为（）mm. ["4","3","2","1"] 钻头