I am inheriting maintenance.request and adding four buttons on maintenance form. I only want to show one button at new request stage and all other three on the next stage. Any help would be appreciable.

XML:

<record model="ir.ui.view" id="maintenance_requests_inherit_view">
        <field name="name">Maintenance Requests</field>
        <field name="model">maintenance.request</field>
        <field name="inherit_id" ref="maintenance.hr_equipment_request_view_form"/>
        <field name="arch" type="xml">
            <xpath expr="//button[@name='archive_equipment_request']" position="after">
                    <button string="Repaired" class="oe_highlight" type="object" name="on_repaired"> </button>
            </xpath>
            <xpath expr="//button[@name='archive_equipment_request']" position="after">
                    <button string="Inspect" class="oe_highlight" type="object" name="on_inspect"> </button>
            </xpath>
            <xpath expr="//button[@name='archive_equipment_request']" position="after">
                    <button string="Material Requisition" class="oe_highlight" type="object" name="on_material_requisition"> </button>
            </xpath>
            <xpath expr="//button[@name='archive_equipment_request']" position="after">
                    <button string="Invoice" class="oe_highlight" type="object" name="generate_invoice"> </button>
            </xpath>