It analyzes in detail the effective protection against the career disbenifit, and points out that welders should strengthen their own protection to avoid physical damage.
着重分析了面对名种职业危害，制订的有效防护措施，指出焊接操作人员应加强自身安全防护，以避免身体的损害。
Physical fault is their own hard drive hardware damage occurred, leading to the hard disk can not function properly, identification or access data.
物理故障是指硬盘自身发生硬件损坏，导致硬盘无法正常运转、识别或存取数据。
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