Manufacture and inspection for sight glass shall be in accordance with HGJ501-502-86 standard.
制造、检测标准：参照“HGJ501-502-86压力容器视镜”设计制造和验收。
In recent years, the aspheric lens is widely used because of its superiority to the spherical lens, but the manufacture and inspection is much more difficult.
由于非球面镜在性能上大大优于球面镜，近年来得到了广泛的应用，但非球面的加工和检验要比球面镜困难得多。
This paper describes the design, manufacture and inspection of large thin walled vessels. It also discusses the precautions against corrosion of titanium lined vessel.
本文对大直径薄壁容器的制造、设计和检验，以及对钛衬里的防腐蚀措施加以研讨。
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