Abstract: A gas measuring apparatus (100), including: a gas collecting device (102), including two gas entrapping compartments (1021, 1022); a fixing frame (103), which is rotatably connected with the gas collecting device (102); positioning holders (104, 105), each of which is located below a corresponding one of the two gas entrapping compartments (1021, 1022) and is configured to limit the rotation angle of the gas collecting device (102) by colliding with an edge of the corresponding one of the gas entrapping compartments (1021, 1022); a chamber (101), which accommodates the gas collecting device (102), the fixing frame (103), the positioning holders (104, 105) and a liquid medium; and a gas inlet (106), which is located below the gas collecting device (102). The apparatus (100) solves the problem of relatively low accuracy of measurement results.

Abstract: Locks for resisting water and/or foreign matters are provided. The lock may include a lock tongue configured to secure an object, a lock pin configured to block the lock tongue to move along an axial direction of the lock tongue, a lock shell configured to accommodate at least a portion of the lock tongue or at least a portion of the lock pin, and a waterproof pipe arranged around at least a portion of the lock pin. The lock shell may include a through-hole. At least a portion of the lock pin may be moveable inward or outward the lock shell through the through-hole. The waterproof pipe may include a first connection end and a second connection end. The first connection end of the waterproof pipe may connect to the lock shell. The second connection end of the waterproof pipe may connect to the lock pin.