Above the circuit between the outdoor unit circuit board and the module. Acceptance standards and methods for printed circuit board components.
Test rack: Electrical and electrical performance of HDI PCB and multi-layer packaging carrier board. The insulation between square terminals and components with pitch isolation on the surface of the substrate used for military PCBs and railway power lines.
Anti static protection: The grounding and signal wires of the power and control wires should be connected to the instrument using flexible wires. Protective and shielding wire components (such as instruments and ground wires) are used in medical electronics, communication, aerospace, and aviation.
Metal casing: used to protect the welding pad and mechanical protection casing, and the protective cover should be different from the instruments installed.
Shell protection: As a connector between conductors, it can provide reliable electrical connection. It also has variable electrical properties.
Aluminum shell: The aluminum shell can be installed on one or two aluminum riveted metal shells as needed. The metal shell connection terminal has the advantages of good durability, aesthetics, good sealing, and variable electrical properties.
The material used is Uc: usually with ordinary metal screws, and the bolts are generally made of stainless steel. Weldability and tight protective sleeve are required. Before tightening the screws, use your hand to tighten them flat to prevent pulling.

Professional foot code, including flame retardant resin in certain parts such as thick and four hole plywood and cylinders. Generally, epoxy adhesive solder paste or epoxy resin adhesive is used to press a rigid copper clad layer onto a wooden board to form a bubble free printed board.
PRCB special parts are generally referred to as "BOEE", "DEEE", or "CE". This piece, for example, the substrate of M012 and M131: the substrate of M1/M4: the substrate of M2/M4: the substrate of M5/M4: the substrate of M16.
N1, N2, N3//M4 substrates: M8/M6 substrates: M6/M8 substrates: M8/M8 substrates: M8/M8 substrates: M8/M8 substrates: M8/M8.