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But the entry Angle and the depth of the screw must be accurate.
但要注意进钉的角度、方向和深度，同时宜采用相应的加强螺钉稳固性的措施。
youdao
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Straight-through, right angle cast steel screw down vertical storm valve.
直通、直角铸钢可闭立式防浪阀；
youdao
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Straight-through, right angle cast steel screw down vertical storm valve.
直通、直角铸钢可闭立式防浪阀；
youdao