right-angle elbow pipe ; quarter bend
... 高速冲床 quick working punch 直角弯管 quarter bend 淬火及回火 quenched and tempered (QT) ...
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直角弯管接头 [机] elbow unions ; Square Elbow ; [机] rest bend
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保护管直线长度超过30 m时需加装接线盒，同一管线超过两个直角弯时应加设中间接线盒。
When the linear length of the protecting pipe is over 30m, the junction box should be added; and when there are more than 2 right-angle bends, junction box should be added between them.
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