数以千计的信件 letters by the thousands
以按件计算为基础 piece rate basis
以件计
By the piece
以上为机器翻译结果，长、整句建议使用 人工翻译 。
重型压力计的外壳和功能性零部件均按照特殊质量参数制造，以专用生产流程进行安装，并经过了数次检查。
The housing and functional parts of the heavy-duty manometer are manufactured with the aid of specific quality parameters, mounted in a special production process and checked many times.
youdao
应用推荐
模块上移
模块下移
不移动