Looks like you have a many to many relationship. It's true that an order will contain many items of equipment, and a piece of equipment can be within many orders, but for 3NF that presents a problem. Instead what you have to do is build a composite key table. I haven't created the Keys etc for you, but as VERY simple exampe you'd need 3 tables along the lines of:
This means you end up with a one to many relationship between ClientOrder and EquipmentOrder (A Client Order contains many Equipment Orders) and a one to many for Equipment and EquipmentOrders (A piece of Equipment is in many Equipment Orders).
Hopefully that gets you on the right path.
Thom~
Excuse my typos and sometimes awful grammar. My fingers work faster than my brain does.
Larnu.uk