safety block

基本解释

It's installed the safety inserting block and the brake instrument to guard falling.
安装有平层停靠的安全插块和防止坠落作用的制动装置。
Open the stop handle to test the safety inserting block, when it stretch out, whether it can insert into the angle steel of the standard section or not.
打开平层停靠手柄，检查安全插块是否顺利伸缩，伸出时，是否插入到标准节三角框角钢以内。
Test the rope break safety instrument is normal or not according to article 4.5 and 4.6 of section 4, if the safety inserting block has stretch out and insert into the guiding track or not.
按照第四章第4.5条和4.6条的规定仔细检查断绳安全装置是否正常、可靠。安全插块是否可靠伸出，插入导轨架。

Reallocating the D Block to public safety is the right thing to do and it will give our first responders a number of new capabilities.
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The public safety community believes that the block of spectrum it had been allocated is not enough to enable the type of interoperable data, video, and future voice services needed to ensure that all public safety organizations including federal, state, and local agencies could communicate during incidents.
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Later at the public safety press conference, Senators Joe Liebermann (I-CT) and John McCain (R-AZ) announced that they had, that day, introduced a bill in the Senate that also calls for the reallocation of the D Block to public safety and would provide funding using revenue from future auctions.
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