1·M: if you send fitters along with the machines to ensure that all the machines run properly, and if you provide after-sales service, we agree to make the payment in full.
W：如果你们随机器派装配工保证机器正常运转，而且保证售后服务的话，我们就同意全额付款。
2·Gas fitters install, inspect, repair and maintain gas lines and gas equipment such as meters, regulators and heating units in residential, commercial and industrial establishments.
燃气装配工安装，检查，维修和保养住宅，商业和工业机构的天然气管道和燃气设备，如仪表，稳压器和供热单位。
3·This occupation group covers Metal Fitters and Machinists not elsewhere classified.
包括在其它地方未分类的金属装配工和机修工。